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
1882259Factored
FactorDigitsBitsDate
27895078391031.4old
4413237208364593171212168.62020-10-18 13:34:32
4727933179462968123592168.72021-10-28 13:39:18
12352690758290009018812270.12015-08-27 15:07:25
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-04Oliver Kruse134B5AA5A82C9FC32013
Verified (Factored)2017-11-08kkmrkkblmbrbk134B5AA5A82C9FC32160024113
Verified (Factored)2020-10-21arnaud691E19E76D68E846326103753
Verified2021-10-29JackBlock691E19E76D68E846469113653
P-1 factors
DateFactorB1B2
2015-08-27123526907582900090188150000015000000
History
DateUserTypeResult
2021-10-29GregCERT
PRP Certification
Proof certified good
2021-10-29JackBlockC-PRP
M1882259/2789507839/441323720836459317121/472793317946296812359/1235269075829000901881 : 691E19E76D68E846
PRP proof power = 7
PRP: Verified
Proof certified good
2021-10-28TJAOIF-ECM
Factor: 472793317946296812359 / (ECM curve 82, B1=50000, B2=6600000)
2020-10-21curtiscCERT
PRP Certification
Proof certified good
2020-10-21arnaudC-PRP
M1882259/2789507839/1235269075829000901881/441323720836459317121 : 691E19E76D68E846
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2020-10-18nordiF-ECM
Factor: 441323720836459317121 / (ECM curve 4, B1=50000, B2=5000000, Sigma=362559465412725)
2017-11-08kkmrkkblmbrbkC-PRP
M1882259/2789507839/1235269075829000901881 : 134B5AA5A82C9FC3
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1882259/2789507839/1235269075829000901881 : 134B5AA5A82C9FC3
PRP: Verified (Factored)
PRP without proof (not generated)
2015-08-27alpertronF-PM1
Factor: 1235269075829000901881 / (P-1, B1=500000, B2=15000000, E=12)