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
1990553Composite: proven not-prime with both PRP and Lucas-Lehmer tests
TF
No factors below 271
TF target 262
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 20000000
B2 = 52344842550
ECM
DigitsB1Curves
2550000280 / 280
30250000104 / 640
Estimated T-Level: 25.8
LL
StatusDateUserResidueShift
VerifiedThomas HonoldD4230AE76B192D830
Verified1999-04-02Chuck WhiteD4230AE76B192D83370653
Verified2015-07-10MadPooD4230AE76B192D83727827
PRP
StatusDateUserResidueShiftTypeBase
Verified2025-09-02Kriesel81B03B75887AF811013
History
DateUserTypeResult
2025-09-03JurzalCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
81B03B75887AF811
PRP proof power = 6
PRP: Verified
Proof certified good
2022-08-13masserNF-PP1
Start=2/7, B1=1400000, B2=46200000
2022-03-05RichD0NF-PM1
B1=20000000, B2=52344842550
2018-11-26JossNF-PM1
B1=1990553, B2=248819125, E=12
2018-05-21JossNF-PM1
B1=1990553, B2=199055300, E=12
2018-03-10JossNF-PM1
B1=1990553, B2=120000000, E=12
2018-02-15JossNF-PM1
B1=1990553, B2=60000000, E=12
2018-01-29JossNF-PM1
B1=1990553, B2=30000000, E=12
2018-01-28JossNF-PM1
B1=1205760
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-25ramgeisNF
no factor from 2^70 to 2^71
2015-07-10MadPooC-LL
D4230AE76B192D83
2014-01-04Never Odd Or EvenNF
no factor from 2^69 to 2^70
2014-01-04Never Odd Or EvenNF
no factor from 2^68 to 2^69
2014-01-04Never Odd Or EvenNF
no factor from 2^67 to 2^68
2014-01-04Never Odd Or EvenNF
no factor from 2^66 to 2^67
2014-01-04Never Odd Or EvenNF
no factor from 2^65 to 2^66
2011-05-03megavinkNF
no factor from 2^64 to 2^65
2011-05-03megavinkNF
no factor from 2^63 to 2^64
2011-05-03megavinkNF
no factor from 2^62 to 2^63
2011-05-03megavinkNF
no factor from 2^61 to 2^62
2011-02-05kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2009-12-11S485122NF
no factor from 2^60 to 2^61