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
75883Factored
FactorDigitsBitsDate
46499097162160568534311192581.9old
1992934998440383375474904193480889056738123.92017-01-29 01:16:17
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001052 / 1566
Estimated T-Level: 33.4
TF below 2^106 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse8193EC9FFDB6CFB82013
Verified2017-10-02kkmrkkblmbrbk8193EC9FFDB6CFB82013
Verified2017-12-07ATH8193EC9FFDB6CFB826924713
Verified2020-04-17Oliver Kruse0881ED3C9A5166F127528653
Verified2024-02-03Wentao Huang0881ED3C9A5166F121466353
P-1 factors
DateFactorB1B2
2017-01-291992934998440383375474904193480889056710000000012720901946406
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M75883/4649909716216056853431119/19929349984403833754749041934808890567 : 0881ED3C9A5166F1
PRP: Verified
PRP without proof (small exponent)
2024-02-01masserNF-PP1
Start=157/47, B1=25000000, B2=1775000000
2024-01-30masserNF-PP1
Start=6/5, B1=25000000, B2=1775000000
2024-01-30masserNF-PP1
Start=2/7, B1=25000000, B2=1775000000
2022-04-03George WoltmanNF-PM1
B1=1000000000, B2=95593865877510
2020-04-17Oliver KruseC-PRP
M75883/4649909716216056853431119/19929349984403833754749041934808890567 : 0881ED3C9A5166F1
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M75883/4649909716216056853431119/19929349984403833754749041934808890567 : 8193EC9FFDB6CFB8
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M75883/4649909716216056853431119/19929349984403833754749041934808890567 : 8193EC9FFDB6CFB8
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M75883/4649909716216056853431119/19929349984403833754749041934808890567 : 8193EC9FFDB6CFB8
PRP without proof (not generated)
2017-01-29kkmrkkblmbrbkF-PM1
Factor: 19929349984403833754749041934808890567 / (P-1, B1=100000000, B2=12720901946406)
2016-12-08kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12