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
1823Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
120319616.9old
174286529531134.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
6580000000067127 / 194238
Estimated T-Level: 61.7
TF below 2^200 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse96EA39BB5C37D4272013
Verified2017-10-12kkmrkkblmbrbk96EA39BB5C37D4272103913
Verified2020-04-17Oliver KruseC0020DC7B6F521ED214953
Verified2020-08-12_p95holder_C0020DC7B6F521ED2140953
History
DateUserTypeResult
2022-10-16mikrNF-PM1
B1=500000000000, B2=1966167047999184030
2021-07-24ViliamFNF-PP1
Start=2/7, B1=1000000000, B2=221000000000
2020-08-12_p95holder_C-PRP
M1823/120319/17428652953 : C0020DC7B6F521ED
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M1823/120319/17428652953 : C0020DC7B6F521ED
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M1823/120319/17428652953 : 96EA39BB5C37D427
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M1823/120319/17428652953 : 96EA39BB5C37D427
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M1823/120319/17428652953 : 96EA39BB5C37D427
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=1000000000, B2=100000000000, E=12