2 451 601 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
1213755601924659615001	22	70.0	2011-01-19 01:41:20

ECM

Digits	B1	Curves
25	50000	147 / 280

Estimated T-Level: 22.6 ⓘ

TF below 2^70 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Alma Cavazos-Gaither	C63A14343DAF0CF2	0
Verified (Factored)	1999-05-16	Stephen Wood	C63A14343DAF0CF2	2057520

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-13	Oliver Kruse	FAA3E7EF13D806E6	1	37159	5	3
Verified	2017-11-28	kkmrkkblmbrbk	FAA3E7EF13D806E6	1	656069	5	3

History

Date	User	Type	Result
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-28	kkmrkkblmbrbk	C-PRP	M2451601/1213755601924659615001 : FAA3E7EF13D806E6 PRP: Verified PRP without proof (not generated)
2017-10-13	Oliver Kruse	C-PRP	M2451601/1213755601924659615001 : FAA3E7EF13D806E6 PRP: Verified PRP without proof (not generated)
2011-01-19	Oscar Östlin	F-PM1	Factor: 1213755601924659615001
2010-12-15	Joss	NF-PM1	B1=20000
2009-01-15	Sturle Sunde	NF	no factor from 2^60 to 2^61