Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
571157Factored
FactorDigitsBitsDate
29884235290739614764232271.32008-01-26 03:37:04
ECM
DigitsB1Curves
2550000280 / 280
30250000210 / 640
Estimated T-Level: 26.6
TF below 2^83 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver KruseDB4921E4AC58B0851013
Verified2017-10-13Oliver KruseDB4921E4AC58B08513999313
Verified2017-12-15ATHDB4921E4AC58B085121631813
Unverified (Reliable)2020-04-19Oliver KruseC5F1B5F2813D8E__17558853
History
DateUserTypeResult
2022-12-13USAFSSNF-PM1
B1=1750000, B2=5675249580
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-19Oliver KruseC-PRP
M571157/2988423529073961476423 : C5F1B5F2813D8E__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-15ATHC-PRP
M571157/2988423529073961476423 : DB4921E4AC58B085
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M571157/2988423529073961476423 : DB4921E4AC58B085
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M571157/2988423529073961476423 : DB4921E4AC58B085
PRP: Unverified (Reliable)
PRP without proof (not generated)
2008-01-26Team_BunduF-ECM
Factor: 2988423529073961476423