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

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Exponent Range:










MnStatusDetails
2422261Factored
FactorDigitsBitsDate
19078648095191340.8old
75625701352331342.82008-07-14 20:23:46
240106329564803987832064.42017-09-25 11:24:42
7102978362245025163692169.32018-07-24 10:23:30
ECM
DigitsB1Curves
255000067 / 280
Estimated T-Level: 21.2 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-13Oliver Kruse1244081DB9190F813190361753
Verified (Factored)2017-10-15Yaroslav BerezhkoABAAD600FAD2B8453013
Verified (Factored)2017-11-27kkmrkkblmbrbk1244081DB9190F81314356153
Verified (Factored)2017-12-04kkmrkkblmbrbkABAAD600FAD2B8453150871913
Verified2018-07-26_p95holder_1244081DB9190F81421554153
P-1 factors
DateFactorB1B2
2018-07-24710297836224502516369200000060000000
History
DateUserTypeResult
2018-07-26_p95holder_C-PRP
M2422261/1907864809519/7562570135233/24010632956480398783/710297836224502516369 : 1244081DB9190F81
PRP: Verified
PRP without proof (not generated)
2018-07-24alpertronF-PM1
Factor: 710297836224502516369 / (P-1, B1=2000000, B2=60000000, E=12)
2017-12-04kkmrkkblmbrbkC-PRP
M2422261/1907864809519/7562570135233/24010632956480398783 : ABAAD600FAD2B845
PRP: Verified
PRP without proof (not generated)
2017-11-27kkmrkkblmbrbkC-PRP
M2422261/1907864809519/7562570135233/24010632956480398783 : 1244081DB9190F81
PRP: Verified
PRP without proof (not generated)
2017-10-15Yaroslav BerezhkoC-PRP
M2422261/1907864809519/24010632956480398783/7562570135233 : ABAAD600FAD2B845
PRP: Verified
PRP without proof (not generated)
2017-10-13Oliver KruseC-PRP
M2422261/1907864809519/7562570135233/24010632956480398783 : 1244081DB9190F81
PRP: Verified
PRP without proof (not generated)
2017-09-25TJAOIF
Factor: 24010632956480398783 / TF: 64-65
2008-07-14George WoltmanF-ECM
Factor: 7562570135233