1 252 681 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
4011629598048926927	19	61.8	2011-05-09 14:41:57

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Robert Clark	BE172ED020769DD5	0
Verified (Factored)		Cornelius Caesar	BE172ED020769DD5	0
Verified (Factored)		Brian J. Beesley	BE172ED020769DD5	382703

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-29	Oliver Kruse	1C74941F464C8511	1	0	1	3
Verified	2017-10-20	kkmrkkblmbrbk	1C74941F464C8511	1	829292	1	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2017-10-20	kkmrkkblmbrbk	C-PRP	M1252681/4011629598048926927 : 1C74941F464C8511 PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1252681/4011629598048926927 : 1C74941F464C8511 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=300000, B2=10000000, E=12
2011-05-09	Xyzzy	F-ECM	Factor: 4011629598048926927
2009-02-18	Sturle Sunde	NF	no factor from 2^60 to 2^61