Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
887
Composite, with 4 known prime factors. Cofactor is PRP (Probable-Prime).
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
16173559823.9old
1397140999956260403780492476.9old
23821542973133966494233008812890.9old
195890575661048016541436079870820861717795388105305117785154752898814587973240.12010-02-12 14:30:58
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
No proof (small exponent)
2024-09-06George WoltmanPRP_PRP_PRP_PRP_4013
History
DateUserTypeResult
2024-09-06George WoltmanP-PRPM887/16173559/139714099995626040378049/2382154297313396649423300881/1958905756610480165414360798708208617177953881053051177851547528988145879
PRP Cofactor
2010-02-12-anonymous-F-ECMFactor: 1958905756610480165414360798708208617177953881053051177851547528988145879