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
4957Factored
FactorDigitsBitsDate
148711617.2old
3003943721.5old
81790797431032.9old
1208128397835972785660503072294377556738123.22016-09-01 04:05:32
255018120998178788484162515955078505833088622346150.82020-08-29 12:50:04
24698385098141585369555580091474607163010676807348157.42017-02-09 01:33:00
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000014860 / 40830
Estimated T-Level: 51.8 ⓘ
TF below 2^167 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-21Oliver Kruse5639FE8CADE78EE05013
Verified (Factored)2017-10-02kkmrkkblmbrbk5639FE8CADE78EE05013
Verified (Factored)2017-12-07ATH5639FE8CADE78EE05370513
Verified (Factored)2020-04-17Oliver Kruse9A78485A02C68A145444653
Verified2020-08-29M Miller9A78485A02C68A146429153
P-1 factors
DateFactorB1B2
2017-02-09246983850981415853695555800914746071630106768073100000000000109863493910757904
History
DateUserTypeResult
2020-08-29M MillerC-PRP
M4957/148711/3003943/8179079743/12081283978359727856605030722943775567/246983850981415853695555800914746071630106768073/2550181209981787884841625159550785058330886223 : 9A78485A02C68A14
PRP: Verified
PRP without proof (small exponent)
2020-08-29Alex KruppaF-ECM
Factor: 2550181209981787884841625159550785058330886223 / (ECM curve 2878, B1=11000000, B2=1100000000, Sigma=1814333942129993)
2020-04-17Oliver KruseC-PRP
M4957/148711/3003943/8179079743/12081283978359727856605030722943775567/246983850981415853695555800914746071630106768073 : 9A78485A02C68A14
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M4957/148711/3003943/8179079743/12081283978359727856605030722943775567/246983850981415853695555800914746071630106768073 : 5639FE8CADE78EE0
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M4957/148711/3003943/8179079743/12081283978359727856605030722943775567/246983850981415853695555800914746071630106768073 : 5639FE8CADE78EE0
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M4957/known_factors : 5639FE8CADE78EE0
PRP without proof (not generated)
2017-02-09kkmrkkblmbrbkF-PM1
Factor: 246983850981415853695555800914746071630106768073 / (P-1, B1=100000000000, B2=109863493910757900)
2016-09-01kkmrkkblmbrbkF-ECM
Factor: 12081283978359727856605030722943775567 / (ECM curve 1191, B1=3000000, B2=300000000)