CheckDigits.Net 1.0.0-alpha

.NET 7.0
This is a prerelease version of CheckDigits.Net.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package CheckDigits.Net --version 1.0.0-alpha
NuGet\Install-Package CheckDigits.Net -Version 1.0.0-alpha
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="CheckDigits.Net" Version="1.0.0-alpha" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add CheckDigits.Net --version 1.0.0-alpha
#r "nuget: CheckDigits.Net, 1.0.0-alpha"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
// Install CheckDigits.Net as a Cake Addin
#addin nuget:?package=CheckDigits.Net&version=1.0.0-alpha&prerelease

// Install CheckDigits.Net as a Cake Tool
#tool nuget:?package=CheckDigits.Net&version=1.0.0-alpha&prerelease

CheckDigits.Net

CheckDigits.Net brings together in one library an extensive collection of different check digit algorithms. CheckDigits.Net has the goal that each algorithm supported be optimized, be resilient to malformed input and that memory allocations be minimized or eliminated completely. Benchmarks for each algorithm are provided to demonstrate performance over a range of values and the memory allocation (if any).

Table of Contents

Check Digit Overview

Check digits are a useful tool for detecting human transcription errors. By embedding a check digit in a piece of information it is possible to detect common data entry errors early, often before performing more extensive and time consuming processing.

Typical errors that can be detected by check digit algorithms include:

  • Single digit transcription errors (any single digit in a value being entered incorrectly).
  • Two digit transposition errors (two adjacent digits being swapped, i.e. ab → ba).
  • Twin errors (two identical digits being replaced by another pair, i.e. aa → bb).
  • Two digit jump transpositions (two digits separated by one position being swapped, i.e. abc → cba).
  • Jump twin errors (two identical digits separated by one position being replaced by another pair, i.e. aba → cbc).

Check digit algorithms attempt to balance detection capabilities with the cost in execution time and/or the complexity to implement.

Note also that if a value has a valid check digit, it does not imply that the value is valid, only that the value was transcribed correctly. There may be other requirements that are specific to the type of value that could cause a value with a valid check digit to be considered incorrect/invalid.

Supported Algorithms

Value/Identifier Types and Associated Algorithms

Value/Identifier Type Algorithm
ABA Routing Transit Number ABA RTN Algorithm
CA Social Insurance Number Luhn Algorithm
CAS Registry Number Modulus10 Algorithm
Credit card number Luhn Algorithm
EAN-8 Modulus10_13 Algorithm
EAN-13 Modulus10_13 Algorithm
GTIN-8 Modulus10_13 Algorithm
GTIN-12 Modulus10_13 Algorithm
GTIN-13 Modulus10_13 Algorithm
GTIN-14 Modulus10_13 Algorithm
IMEI Luhn Algorithm
IMO Number Modulus10 Algorithm
ISBN-10 Modulus11 Algorithm
ISBN-13 Modulus10_13 Algorithm
ISIN ISIN Algorithm
ISMN Modulus10_13 Algorithm
ISSN Modulus11 Algorithm
UK National Health Service Number NHS Algorithm
US National Provider Identifier NPI Algorithm
SSCC Modulus10_13 Algorithm
Vehicle Identification Number VIN Algorithm
UPC-A Modulus10_13 Algorithm
UPC-E Modulus10_13 Algorithm

Using CheckDigits.Net

Add a reference to CheckDigits.Net to your project.

Obtain an instance of the desired check digit algorithm. Either create an instance by using new AlgorithmXyz() or using the static Algorithms class to get a lazily instantiated singleton instance of the desired algorithm.

Calculate a check digit for a value by invoking the TryCalculateCheckDigit method.

Validate a value that contains a check digit by invoking the Validate method.

Examples:

using CheckDigits.Net;

// Create a new instance of the Luhn algorithm.
var algorithm = new LuhnAlgorithm();

// Get a lazily instantiated singleton instance of the Luhn algorithm.
var lazy = Algorithms.Luhn;


// Calculate the check digit for a value that does not already contain a check digit.
var newValue = "123456789012345";
var successful = algorithm.TryCalculateCheckDigit(newValue, out var checkDigit);  // Returns true; checkDigit will equal '2'

// Validate a value that contains a check digit.
var toValidate = "1234567890123452";
var isValid = lazy.Validate(toValidate);    // Returns true

Interfaces

A check digit algorithm is a class that implements two different interfaces. Every algorithm implements ICheckDigitAlgorithm which has properties for getting the algorithm name and algorithm description and a Validate method that accepts a string and returns a boolean value that indicates if the string contains a valid check digit.

Check digit algorithms that use a single character also implement ISingleCheckDigitAlgorithm which has a TryCalculateCheckDigit method that accepts a string value and an out parameter which will contain the calculated check digit or '\0' if it was not possible to calculate the check digit. TryCalculateCheckDigit also returns a boolean value that indicates if the check digit was calculated or not. Mal-formed input such as a null value, an empty string, a string of incorrect length or a string that contains characters that are not valid for the algorithm will return false instead of throwing an exception.

Check digit algorithms that use two character check digits also implement IDoubleCheckDigitAlgorithm. This interface also has a TryCalculateCheckDigit method, but the output parameter is a string instead of a character.

Note that ISingleCheckDigitAlgorithm and IDoubleCheckDigitAlgorithm are not implemented for algorithms for government issued identifiers (for example, UK NHS numbers and US NPI numbers) or values issued by a single authority (such as ABA Routing Transit Numbers).

Algorithm Descriptions

ABA RTN Algorithm

Description

The American Bankers Association (ABA) Routing Transit Number (RTN) algorithm is a modulus 10 algorithm that uses weights 3, 7 and 1. The algorithm can detect all single digit transcription errors and most two digit transposition errors except those where the transposed digits differ by 5 (i.e. 1 ↔ 6, 2 ↔ 7, etc.).

The ABA RTN algorithm only supports validation of check digits and does support calculation of check digits.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - decimal digit ('0' - '9')
  • Check digit location - ninth digit
  • Value length - 9 characters
  • Class name - AbaRtnAlgorithm

Wikipedia: https://en.wikipedia.org/wiki/ABA_routing_transit_number#Check_digit

Damm Algorithm

Description

The Damm algorithm was first described by H. Michael Damm in 2004. It is similar to the Verhoeff algorithm in that it can detect all single digit transcription errors and all two digit transposition errors and that it uses a precomputed table instead of modulus operations to calculate the check digit. Unlike the Verhoeff algorithm, the Damm algorithm uses a single quasigroup table of order 10 instead of the multiple tables used by Verhoeff. The implementation of the Damm algorithm provided by CheckDigits.Net uses the table generated from the quasigroup specified on page 111 of Damm's doctoral dissertation.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Class name - DammAlgorithm

Wikipedia: https://en.wikipedia.org/wiki/Damm_algorithm

ISIN Algorithm

Description

The ISIN (International Securities Identification Number) algorithm uses a variation of the Luhn algorithm and has all of the capabilities of the Luhn algorithm, including the ability to detect all single digit (or character) transcription errors and most two digit transposition errors except 09 → 90 and vice versa.

The algorithm has significant weaknesses. Transpositions of two letters cannot be detected. Additionally, transpositions of a digit character and the letters B, M or X cannot be detected (because B is converted to 11, M to 22 and X to 33 and when combined with another digit, the result is a jump transposition that the Luhn algorithm cannot detect).

Details
  • Valid characters - alphanumeric characters ('0' - '9', 'A' - 'Z')
  • Check digit size - one character
  • Check digit value - decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Value length - 12
  • Class name - IsinAlgorithm
Common Applications
  • International Securities Identification Number (ISIN)

Wikipedia: https://en.wikipedia.org/wiki/International_Securities_Identification_Number

Luhn Algorithm

Description

The Luhn algorithm is a modulus 10 algorithm that was developed in 1960 by Hans Peter Luhn. It can detect all single digit transcription errors and most two digit transposition errors except 09 → 90 and vice versa. It can also detect most twin errors (i.e. 11 ↔ 44) except 22 ↔ 55, 33 ↔ 66 and 44 ↔ 77.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Class name - LuhnAlgorithm
Common Applications
  • Credit card numbers
  • International Mobile Equipment Identity (IMEI) numbers
  • Canadian Social Insurance Number (SIN)

Wikipedia: https://en.wikipedia.org/wiki/Luhn_algorithm

Modulus10_1 Algorithm

The Modulus10 algorithm uses modulus 10 and each digit is weighted by its position in the value, starting with weight 1 for the right-most non-check digit character.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - either decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Max length - 9 characters when generating a check digit; 10 characters when validating
  • Class name - Modulus10_1Algorithm
Common Applications
  • Chemical Abstracts Service (CAS) Registry Number

Wikipedia: https://en.wikipedia.org/wiki/CAS_Registry_Number

Modulus10_2 Algorithm

The Modulus10 algorithm uses modulus 10 and each digit is weighted by its position in the value, starting with weight 2 for the right-most non-check digit character.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - either decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Max length - 9 characters when generating a check digit; 10 characters when validating
  • Class name - Modulus10_2Algorithm
Common Applications
  • International Maritime Organization (IMO) Number

Wikipedia: https://en.wikipedia.org/wiki/IMO_number

Modulus10_13 Algorithm

Description

The Modulus10_13 algorithm is a widely used modulus 10 algorithm that uses weights 1 and 3 (odd positions have weight 3, even positions have weight 1). It can detect all single digit transcription errors and ~80% of two digit transposition errors (except where the transposed digits have a difference of 5, i.e. 1 ↔ 6, 2 ↔ 7, etc.). The algorithm cannot detect two digit jump transpositions.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Class name - Modulus10_13Algorithm
Common Applications
  • Global Trade Item Number (GTIN-8, GTIN-12, GTIN-13, GTIN-14)
  • International Article Number/European Article Number (EAN-8, EAN-13)
  • International Standard Book Number, starting January 1, 2007 (ISBN-13)
  • International Standard Music Number (ISMN)
  • Serial Shipping Container Code (SSCC)
  • Universal Product Code (UPC-A, UPC-E)

Wikipedia: https://en.wikipedia.org/wiki/Universal_Product_Code#Check_digit_calculation https://en.wikipedia.org/wiki/International_Article_Number#Calculation_of_checksum_digit

Modulus11 Algorithm

Description

The Modulus11 algorithm uses modulus 11 and each digit is weighted by its position in the value, starting from the right-most digit. Prior to the existence of the Verhoeff algorithm and the Damm algorithm it was popular because it was able to detect two digit transposition errors while using only a single character. However, because it used modulus 11, the check digit could not be a single decimal digit. Commonly an 'X' character was used when the modulus operation resulted in a value of 10. This meant that identifiers that used the Modulus11 algorithm could not be stored as numbers and instead must be strings.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - either decimal digit ('0' - '9') or an uppercase 'X'
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Max length - 9 characters when generating a check digit; 10 characters when validating
  • Class name - Modulus11Algorithm
Common Applications
  • International Standard Book Number, prior to January 1, 2007 (ISBN-10)
  • International Standard Serial Number (ISSN)

Wikipedia: https://en.wikipedia.org/wiki/ISBN#ISBN-10_check_digits https://en.wikipedia.org/wiki/ISSN

NHS Algorithm

Description

UK National Health Service (NHS) identifiers use a variation of the Modulus 11 algorithm. However, instead of generating 11 possible values for the check digit, the NHS algorithm does not allow a remainder of 10 (the 'X' character used by the Modulus 11 algorithm). Any possible NHS number that would generate a remainder of 10 is not allowed and those numbers are not issued. This means that the check digit for a NHS number remains '0' - '9'. The NHS algorithm retains all error detecting capabilities of the Modulus 11 algorithm (detecting all single digit transcription errors and all two digit transposition errors).

The NHS algorithm only supports validation of check digits and does support calculation of check digits.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Value length - 10 characters
  • Class name - NhsAlgorithm

Wikipedia: https://en.wikipedia.org/wiki/NHS_number#Format,_number_ranges,_and_check_characters https://www.datadictionary.nhs.uk/attributes/nhs_number.html

NPI Algorithm

Description

US National Provider Identifiers (NPI) use the Luhn algorithm to calculate the check digit located in the trailing (right-most) position. However, before calculating, the value is prefixed with a constant "80840" and the check digit is calculated using the entire 15 digit string. The resulting check digit has all the capabilities of the base Luhn algorithm (detecting all single digit transcription errors and most two digit transposition errors except 09 → 90 and vice versa as well as most twin errors (i.e. 11 ↔ 44) except 22 ↔ 55, 33 ↔ 66 and 44 ↔ 77.

(You can create and validate NPI check digits using the standard Luhn algorithm by first prefixing your value with "80840". However, CheckDigits.Net's implementation of the NPI algorithm handles the prefix internally and without allocating an extra string.)

The NPI algorithm only supports validation of check digits and does support calculation of check digits.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Value length - 10 characters
  • Class name - NpiAlgorithm

Wikipedia: https://en.wikipedia.org/wiki/National_Provider_Identifier

Verhoeff Algorithm

Description

The Verhoeff algorithm was the first algorithm using a single decimal check digit that was capable of detecting all single digit transcription errors and all two digit transposition errors. It was first described by Jacobus Verhoeff in 1969. Prior to Verhoeff it was believed that it was not possible to define an algorithm that used a single decimal check digit that could detect both all single digit transcription errors and all two digit transposition errors. Verhoeff's algorithm does not use modulus operations and instead uses a dihedral group (typically implemented as a set of lookup tables). Additionally, Verhoeff's algorithm can detect many, though not all, twin errors, two digit jump transpositions and jump twin errors.

Details
  • Valid characters - decimal digits ('0' - '9')
  • Check digit size - one character
  • Check digit value - decimal digit ('0' - '9')
  • Check digit location - assumed to be the trailing (right-most) character when validating
  • Class name - VerhoeffAlgorithm

Wikipedia: https://en.wikipedia.org/wiki/Verhoeff_algorithm

VIN Algorithm

Description

The VIN (Vehicle Identification Number) algorithm is used on the VIN of vehicles sold in North America (US and Canada). The check digit is the 9th character of the 17 character value. Upper-case alphabetic characters (except 'I', 'O' and 'Q') are allowed in the value and must be transliterated to integer values before weighting, summing and calculating sum modulus 11.

Details
  • Valid characters - decimal digits ('0' - '9') and upper case letters ('A' - 'Z'), excluding 'I', 'O' and 'Q'
  • Check digit size - one character
  • Check digit value - either decimal digit ('0' - '9') or an uppercase 'X'
  • Check digit location - 9th character of 17
  • Length - 17 characters
  • Class name - VinAlgorithm

Wikipedia: https://en.wikipedia.org/wiki/Vehicle_identification_number#Check-digit_calculation

Benchmarks

ABA RTN Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
Validate 111000025 9.766 ns 0.1837 ns 0.1719 ns -
Validate 122235821 7.654 ns 0.0508 ns 0.0424 ns -

Damm Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit 123 6.777 ns 0.1300 ns 0.1391 ns -
TryCalculateCheckDigit 1234567 10.331 ns 0.0842 ns 0.0747 ns -
TryCalculateCheckDigit 12345678901 17.846 ns 0.1478 ns 0.1383 ns -
TryCalculateCheckDigit 123456789012345 24.807 ns 0.1143 ns 0.1013 ns -
Validate 1234 7.076 ns 0.0772 ns 0.0722 ns -
Validate 12345671 14.179 ns 0.1678 ns 0.1569 ns -
Validate 123456789018 20.616 ns 0.1890 ns 0.1676 ns -
Validate 1234567890123450 27.317 ns 0.3768 ns 0.3340 ns -

ISIN Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit AU0000XVGZA 28.73 ns 0.192 ns 0.170 ns -
TryCalculateCheckDigit US037833100 22.47 ns 0.102 ns 0.090 ns -
TryCalculateCheckDigit US88160R101 23.49 ns 0.113 ns 0.100 ns -
Validate AU0000XVGZA3 25.01 ns 0.141 ns 0.125 ns -
Validate US0378331005 21.64 ns 0.096 ns 0.075 ns -
Validate US88160R1014 21.78 ns 0.110 ns 0.103 ns -

Luhn Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit 123 6.515 ns 0.0929 ns 0.0823 ns -
TryCalculateCheckDigit 1234567 11.231 ns 0.0436 ns 0.0386 ns -
TryCalculateCheckDigit 12345678901 15.473 ns 0.1082 ns 0.0959 ns -
TryCalculateCheckDigit 123456789012345 20.098 ns 0.1274 ns 0.1192 ns -
Validate 1230 6.013 ns 0.0836 ns 0.0741 ns -
Validate 12345674 11.205 ns 0.1065 ns 0.0944 ns -
Validate 123456789015 16.183 ns 0.0963 ns 0.0854 ns -
Validate 1234567890123452 21.322 ns 0.1223 ns 0.1144 ns -

Modulus10_1 Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit 5808 3.690 ns 0.0185 ns 0.0173 ns -
TryCalculateCheckDigit 773218 5.000 ns 0.0224 ns 0.0187 ns -
TryCalculateCheckDigit 2872855 6.844 ns 0.0618 ns 0.0548 ns -
Validate 58082 5.023 ns 0.0352 ns 0.0312 ns -
Validate 7732185 6.437 ns 0.0241 ns 0.0188 ns -
Validate 28728554 8.371 ns 0.0582 ns 0.0454 ns -

Modulus10_2 Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit 101056 6.495 ns 0.0518 ns 0.0485 ns -
TryCalculateCheckDigit 907472 4.998 ns 0.0625 ns 0.0585 ns -
TryCalculateCheckDigit 970779 4.983 ns 0.0221 ns 0.0196 ns -
Validate 1010569 7.811 ns 0.0259 ns 0.0217 ns -
Validate 9074729 6.455 ns 0.0572 ns 0.0535 ns -
Validate 9707792 6.434 ns 0.0270 ns 0.0211 ns -

Modulus10_13 Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit 42526 7.930 ns 0.0835 ns 0.0781 ns -
TryCalculateCheckDigit 7351353 9.555 ns 0.0784 ns 0.0695 ns -
TryCalculateCheckDigit 03600029145 13.919 ns 0.0969 ns 0.0859 ns -
TryCalculateCheckDigit 400638133393 15.269 ns 0.1063 ns 0.0942 ns -
TryCalculateCheckDigit 01234567800004567 20.179 ns 0.1361 ns 0.1137 ns -
Validate 425261 9.988 ns 0.0857 ns 0.0760 ns -
Validate 73513537 11.595 ns 0.1365 ns 0.1140 ns -
Validate 036000291452 17.259 ns 0.1901 ns 0.1778 ns -
Validate 4006381333931 18.816 ns 0.1374 ns 0.1285 ns -
Validate 012345678000045678 24.910 ns 0.1319 ns 0.1101 ns -

Modulus11 Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit 123 4.294 ns 0.0272 ns 0.0242 ns -
TryCalculateCheckDigit 0317847 8.360 ns 0.1112 ns 0.1040 ns -
TryCalculateCheckDigit 050027293 7.497 ns 0.1352 ns 0.1265 ns -
Validate 1235 5.634 ns 0.0657 ns 0.0549 ns -
Validate 03178471 9.295 ns 0.1752 ns 0.1874 ns -
Validate 050027293X 10.052 ns 0.1027 ns 0.0911 ns -

NHS Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
Validate 3967487881 12.38 ns 0.076 ns 0.059 ns -
Validate 8514468243 10.86 ns 0.063 ns 0.059 ns -
Validate 9434765919 10.90 ns 0.121 ns 0.113 ns -

NPI Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
Validate 1234567893 15.59 ns 0.296 ns 0.277 ns -
Validate 1245319599 14.51 ns 0.256 ns 0.239 ns -

Verhoeff Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit 123 11.19 ns 0.140 ns 0.131 ns -
TryCalculateCheckDigit 1234567 19.94 ns 0.196 ns 0.174 ns -
TryCalculateCheckDigit 12345678901 30.21 ns 0.313 ns 0.293 ns -
TryCalculateCheckDigit 123456789012345 40.84 ns 0.575 ns 0.538 ns -
Validate 1233 12.70 ns 0.169 ns 0.150 ns -
Validate 12345679 25.02 ns 0.163 ns 0.136 ns -
Validate 123456789010 36.81 ns 0.304 ns 0.270 ns -
Validate 1234567890123455 48.69 ns 0.255 ns 0.199 ns -

VIN Algorithm Benchmarks

Method Value Mean Error StdDev Allocated
TryCalculateCheckDigit 1G8ZG127XWZ157259 41.90 ns 0.793 ns 0.848 ns -
TryCalculateCheckDigit 1HGEM21292L047875 40.66 ns 0.560 ns 0.496 ns -
TryCalculateCheckDigit 1M8GDM9AXKP042788 40.17 ns 0.811 ns 0.719 ns -
Validate 1G8ZG127XWZ157259 42.01 ns 0.670 ns 0.627 ns -
Validate 1HGEM21292L047875 40.54 ns 0.561 ns 0.525 ns -
Validate 1M8GDM9AXKP042788 40.39 ns 0.687 ns 0.642 ns -

Release History/Release Notes

v1.0.0-alpha

Initial limited release. Included algorithms:

  • ABA RTN (Routing Transit Number) Algorithm
  • Damm Algorithm
  • ISIN (International Securities Identification Number) Algorithm
  • Luhn Algorithm
  • Modulus10_1 Algorithm
  • Modulus10_2 Algorithm
  • Modulus10_13 Algorithm (UPC/EAN/ISBN-13/etc.)
  • Modulus11 Algorithm (ISBN-10/ISSN/etc.)
  • NHS (UK National Health Service) Algorithm
  • NPI (US National Provider Identifier) Algorithm
  • Verhoeff Algorithm
  • VIN (Vehicle Identification Number) Algorithm
Product Compatible and additional computed target framework versions.
.NET net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • net7.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
2.2.0 1,749 1/25/2024
2.1.0 207 12/5/2023
2.0.0 140 11/21/2023
1.1.0 124 11/18/2023
1.0.0 137 10/26/2023
1.0.0-alpha 98 10/14/2023

1.0.0-alpha

Initial limited release. Included algorithms:
* ABA RTN (Routing Transit Number) Algorithm
* Damm Algorithm
* ISIN (International Securities Identification Number) Algorithm
* Luhn Algorithm
* Modulus10_1 Algorithm
* Modulus10_2 Algorithm
* Modulus10_13 Algorithm (UPC/EAN/ISBN-13/etc.)
* Modulus11 Algorithm (ISBN-10/ISSN/etc.)
* NHS (UK National Health Service) Algorithm
* NPI (US National Provider Identifier) Algorithm
* Verhoeff Algorithm
* VIN (Vehicle Identification Number) Algorithm