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
1283Factored
FactorDigitsBitsDate
482467534611425054119824290421439619231940131.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
6580000000069840 / 194238
Estimated T-Level: 61.8
TF below 2^200 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-25csaba2AC6FA81B13AFA6C1013
Verified2017-09-26George Woltman2AC6FA81B13AFA6C139513
Verified2017-10-02kkmrkkblmbrbk2AC6FA81B13AFA6C1013
Verified2020-04-17Oliver Kruse12AFB9E5948AEB7F152753
Verified2020-08-12_p95holder_12AFB9E5948AEB7F157653
History
DateUserTypeResult
2021-12-04Oliver KruseNF-PM1
B1=2500000000000, B2=503160871613400
2021-07-19ViliamFNF-PP1
Start=2/7, B1=1000000000, B2=221000000000
2021-06-01ZacHFXNF-PP1
Start=2/7, B1=10000000, B2=1010000000
2021-03-27nordiNF-PM1
B1=1000000000000, B2=2232843418649129478
2020-11-30Oliver KruseNF-PM1
B1=2500000000000, B2=400000000000000, E=12
2020-08-12_p95holder_C-PRP
M1283/4824675346114250541198242904214396192319 : 12AFB9E5948AEB7F
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M1283/4824675346114250541198242904214396192319 : 12AFB9E5948AEB7F
PRP: Verified
PRP without proof (small exponent)
2018-12-12JossNF-PM1
B1=62000000000, B2=1400000000000, E=12
2018-12-11JossNF-PM1
B1=62000000000, B2=620000000000, E=12
2018-12-11JossNF-PM1
B1=62000000000, B2=400000000000, E=12
2018-12-11JossNF-PM1
B1=62000000000, B2=200000000000, E=12
2018-12-11JossNF-PM1
B1=62000000000, B2=102000000000, E=12
2018-12-09JossNF-PM1
B1=30000000000
2018-12-09JossNF-PM1
B1=20000000000
2018-12-08JossNF-PM1
B1=10000000000
2017-10-02kkmrkkblmbrbkC-PRP
M1283/4824675346114250541198242904214396192319 : 2AC6FA81B13AFA6C
PRP: Verified
PRP without proof (not generated)
2017-09-26George WoltmanC-PRP
M1283/4824675346114250541198242904214396192319 : 2AC6FA81B13AFA6C
PRP: Verified
PRP without proof (not generated)
2017-09-25csabaC-PRP
M1283/known_factors : 2AC6FA81B13AFA6C
PRP: Verified
PRP without proof (not generated)
2017-04-21nordiNF-PM1
B1=7974098357, B2=637927868521, E=12
2017-03-09ZacHFXF-ECM
Factor: 4824675346114250541198242904214396192319 / (ECM curve 403, B1=110000000, B2=11000000000)
2017-03-09ZacHFXNF-PM1
B1=1000000, B2=100000000, E=12