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Mersenneplustwo factorizations
| Last update: 2019-03-05 |
The Mersenneplustwo factorizations is a distributed computing project, which tries to factor numbers of the form: 2p+1 (with p being a prime, as well as simultaneously 2p-1 being prime). All such numbers are divisible by 3 since 2p-1 is not divisible by 3 (it's assumed to be prime) and 2p is not divisible by 3 (it's only prime factor is 2).
It is managed by James Wanless (Bearnol).
Contents
[hide]How to participate
Participants use ECMclient to automatically download numbers, do ECM curves on them and upload them again.
Status
As of this moment (2005-09-12), about 8GHz is being dedicated to this project. Update needed or remove! More recently (2019-03-05), about 100GHz on the ECMNet.
Results
Best results so far include 37-digit factor of M9941+2 (FDBid) found by ECMNet, as well as 36-digit factor of M11213+2 (FDBid) found using mprime (the linux version of Prime95 by George Woltman).
More recently, a 41-digit factor of M110503+2 (FDBid) was also found by ECMNet.
