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:





MnDetails
4481
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
1447970665889230081673675488874769735113.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000016725 / 40830
Estimated T-Level: 52.0
TF below 2^168 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver Kruse8ABD51DDE48A8E111013
Verified
No proof (small exponent)
2017-10-12kkmrkkblmbrbk8ABD51DDE48A8E111227513
Verified
No proof (small exponent)
2020-04-17Oliver KruseEFC6C6D8573EE3911172153
Verified
No proof (small exponent)
2024-02-03Wentao HuangEFC6C6D8573EE3911123053
History
DateUserTypeResult
2025-05-16masserNF-PP1Start=116/41, B1=2100000000, B2=2097900000000
2024-02-03Wentao HuangC-PRPM4481/14479706658892300816736754888747697 : EFC6C6D8573EE391
2023-05-23-anonymous-NF-PM1B1=71000000000, B2=711884755657775700
2021-07-06ViliamFNF-PM1B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRPM4481/14479706658892300816736754888747697 : EFC6C6D8573EE391
2017-10-12kkmrkkblmbrbkC-PRPM4481/14479706658892300816736754888747697 : 8ABD51DDE48A8E11
2017-09-21Oliver KruseC-PRPM4481/14479706658892300816736754888747697 : 8ABD51DDE48A8E11
2017-09-21Oliver KruseC-PRPM4481/14479706658892300816736754888747697 : 8ABD51DDE48A8E11
2003-01-16-anonymous-NFno factor TF: 1-57
2003-01-09-anonymous-NF-PM1B1=4290000000
2002-09-22-anonymous-NF-PM1B1=3221225472, B2=4290000000, E=48
2002-08-10-anonymous-NF-PM1B1=2147483648, B2=4290000000, E=48
2002-06-02-anonymous-NF-PM1B1=1073741824, B2=4290000000, E=48
2001-07-03-anonymous-NF-PM1B1=3000000000, B2=4290000000
2001-06-17-anonymous-NF-PM1B1=43000000, B2=4290000000
2001-02-11-anonymous-NF-PM1B1=1000000, B2=100000000
2000-08-24-anonymous-NFno factor TF: 1-56
2000-02-09-anonymous-NFno factor TF: 54-55
1999-12-30-anonymous-NFno factor TF: 53-54
1999-09-22-anonymous-NFno factor TF: 52-53