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
1717321Composite: proven not-prime with both PRP and Lucas-Lehmer tests
TF
No factors below 271
TF target 261
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 17000000
B2 = 256271815800
ECM
DigitsB1Curves
2550000280 / 280
30250000103 / 640
Estimated T-Level: 25.8
LL
StatusDateUserResidueShift
VerifiedDirk Swanson8E9540C5241887CB0
Verified1998-12-21Bryan Fullerton8E9540C5241887CB337726
Verified2015-07-19MadPoo8E9540C5241887CB1214994
PRP
StatusDateUserResidueShiftTypeBase
Verified2025-09-02KrieselF3E04C0DF1A3E388013
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
F3E04C0DF1A3E388
PRP proof power = 6
PRP: Verified
Proof certified good
2023-06-20linamentNF-PM1
B1=17000000, B2=256271815800
2023-06-20linamentNF-PM1
B1=17000000
2023-03-19JossNF-PM1
B1=1717321, B2=3511287780
2023-01-04JossNF-PM1
B1=1717321, B2=1253191170
2021-06-09LaurVNF
no factor from 2^70 to 2^71
2021-06-07LaurVNF-PP1
Start=2/7, B1=5000000, B2=365000000
2021-05-30LaurVNF
no factor from 2^69 to 2^70
2021-05-30LaurVNF
no factor from 2^68 to 2^69
2021-05-10Carlos PinhoNF-PP1
Start=2/7, B1=1000000, B2=51000000
2019-06-17TJAOINF
no factor from 2^67 to 2^68
2018-10-16JossNF-PM1
B1=1717321, B2=188905310, E=12
2018-08-21JossNF-PM1
B1=1717321, B2=171732100, E=12
2018-05-28TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-01ramgeisNF
no factor from 2^65 to 2^66
2015-08-10mikrNF-PM1
B1=3642200, B2=123456789, E=12
2015-07-24JossNF-PM1
B1=1562663
2015-07-19MadPooC-LL
8E9540C5241887CB
2015-07-13JossNF-PM1
B1=1420603
2015-07-07JossNF-PM1
B1=1291458
2015-06-25JossNF-PM1
B1=1174053
2015-06-08JossNF-PM1
B1=1067321
2015-05-26JossNF-PM1
B1=970292
2015-05-22JossNF-PM1
B1=882084
2015-05-07JossNF-PM1
B1=801895
2015-05-02snme2pm1NF
no factor from 2^64 to 2^65
2015-05-02snme2pm1NF
no factor from 2^63 to 2^64
2015-05-01JossNF-PM1
B1=728996
2015-04-08JossNF-PM1
B1=602477
2015-03-14JossNF-PM1
B1=497916
2015-03-06JossNF-PM1
B1=452651
2015-02-22JossNF-PM1
B1=411501
2015-02-16JossNF-PM1
B1=374092
2015-02-03JossNF-PM1
B1=309168
2015-01-09JossNF-PM1
B1=281062
2014-10-05JossNF-PM1
B1=187375
2014-05-03JossNF-PM1
B1=150000
2014-04-01JossNF-PM1
B1=100000
2011-02-07Carsten KossendeyNF-PM1
B1=90000, B2=1507500, E=6
2010-10-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-22Architects CubedNF
no factor from 2^60 to 2^61