Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
1656647Factored
FactorDigitsBitsDate
143813177615111036332063.6old
91717741447285840662732273.02019-11-25 15:13:49
1602911428893762670908012477.12019-02-05 22:38:55
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.
LL
StatusDateUserResidueShift
Verified (Factored)Gordon M. Spence72A9790D5E6C8AA00
Verified (Factored)IES R.Dieste-I.Larrosa72A9790D5E6C8AA00
Verified (Factored)1998-11-14Nuutti Kuosa72A9790D5E6C8AA01160988
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-02Oliver Kruse873039A1CB121E101013
Verified (Factored)2017-11-02kkmrkkblmbrbk873039A1CB121E10189391713
Verified (Factored)2019-02-06Julian11298B06A4AA5BE8B08239452653
Verified (Factored)2019-02-07Ruzovej98B06A4AA5BE8B08240119253
Verified2019-11-25ATH98B06A4AA5BE8B08339040853
History
DateUserTypeResult
2019-11-25ATHC-PRP
M1656647/14381317761511103633/160291142889376267090801/9171774144728584066273 : 98B06A4AA5BE8B08
PRP: Verified
PRP without proof (not generated)
2019-11-25TJAOIF-ECM
Factor: 9171774144728584066273 / (ECM curve 183, B1=50000, B2=5000000)
2019-02-07RuzovejC-PRP
M1656647/14381317761511103633/160291142889376267090801 : 98B06A4AA5BE8B08
PRP: Verified
PRP without proof (not generated)
2019-02-06Julian112C-PRP
M1656647/14381317761511103633/160291142889376267090801 : 98B06A4AA5BE8B08
PRP: Verified
PRP without proof (not generated)
2019-02-05Chang Chia-TcheF-ECM
Factor: 160291142889376267090801 / (ECM curve 3, B1=50000, B2=5000000)
2017-11-02kkmrkkblmbrbkC-PRP
M1656647/14381317761511103633 : 873039A1CB121E10
PRP: Verified
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1656647/14381317761511103633 : 873039A1CB121E10
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12