Information as of 2020-05-19: Data for Riesel 600<k<800 online.

**Done**history entries/primes for**Riesel primes 300<k<800**(Sources see here)**Done**history entries/primes for**Riesel primes 4000<k<4200**(Sources see here)**Done**history entries for**Riesel primes k<300**(Sources see here)**Please check your reservations here****.**

# Mtsieve

Workload type |
Siever |

First release |
2018-02-10 |

Latest version |
1.9.5 2019-08-28 |

## Description

**Mtsieve** is a multi-threaded sieve framework for different sieving programs developed by Mark Rodenkirch.

## Included software

The package contains all C-sources and Windows executables.

The following tools are included:

- afsieve: search for factors of Alternating Factorials
- mfsieve: search for factors of Multifactorial numbers
- cksieve: search for factors of Carol-Kynea primes
- pixsieve: search for factors of a long decimal string where each successive term adds on decimal digit to the end of the previous decimal term
- fbncsieve: search for factors of numbers in the form k•b
^{n}+1 and k•b^{n}-1 for fixed b and n and variable k - fkbnsieve: search for factors of the form k*b
^{n}+c for fixed k, b, and n and variable c - gfndsieve: search for factors of k•2
^{n}+1, remaining terms are potential divisors of Generalized Fermat numbers - kbbsieve: search for factors of numbers of the form k•b
^{b}+1 or k•b^{b}-1 for fixed k and variable b - xyyxsieve: search for factors of x
^{y}+y^{x}and x^{y}-y^{x} - gcwsieve: search for factors of Gen. Cullen primes and Gen. Woodall primes
- psieve: search for factors of Primorials
- twinsieve: search for factors of twin primes
- dmdsieve: search for factors of numbers of the form 2*k*(2
^{p}-1)+1 (potential divisors of Double Mersenne numbers)

## External links

**Sieving program**

Program |

Tools |

Links |