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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
15108199Factored
FactorDigitsBitsDate
21436803524221684432743372580.82022-02-26 14:59:15
ECM
DigitsB1Curves
255000014 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad2002-05-11BadDawgDEB0F6A975FBE5205076473
Verified (Factored)2003-09-29Laura Cooksey263BD674FC726C997340190
Verified (Factored)2005-11-27Andrew Phillips263BD674FC726C997592918
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-06-20kutens06E5449E0E2E96BB11456634053
History
DateUserTypeResult
2023-11-04nordiNF-PM1
B1=480000, B2=454342350
2023-10-22nordiNF-PM1
B1=480000
2023-06-20flaqCERT
PRP Certification
Proof certified good
2023-06-20kutensC-PRP
M15108199/2143680352422168443274337 : 06E5449E0E2E96BB
PRP proof power = 8
PRP: Verified
Proof certified good
2022-02-26ATHF-PP1
Start=2/7, B1=1000000, B2=29000000, Factor: 2143680352422168443274337
2021-10-09-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-06SRBaseNF
no factor from 2^70 to 2^71
2021-06-27lycornNF
no factor from 2^69 to 2^70
2017-10-09ramgeisNF
no factor from 2^68 to 2^69
2016-11-22mikrNF
no factor from 2^67 to 2^68
2014-05-14NesowaNF
no factor from 2^66 to 2^67
2014-05-14NesowaNF
no factor from 2^65 to 2^66