2 565 257 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
97247465258036584031399	23	76.4	2015-08-13 19:21:19

ECM

Digits	B1	Curves
25	50000	14 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Joe Decker	333761F0C26C0EF6	0
Verified (Factored)	1999-04-02	Gary Neilsen	333761F0C26C0EF6	21092

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-15	Oliver Kruse	A8F3CC282A39EF9D	1	1242472	5	3
Verified	2017-12-02	kkmrkkblmbrbk	A8F3CC282A39EF9D	1	2385630	5	3

History

Date	User	Type	Result
2023-01-28	USAFSS	NF-PM1	B1=288000, B2=282154950
2022-03-11	LordJulius	NF	no factor from 2^1 to 2^60
2017-12-02	kkmrkkblmbrbk	C-PRP	M2565257/97247465258036584031399 : A8F3CC282A39EF9D PRP: Verified PRP without proof (not generated)
2017-10-15	Oliver Kruse	C-PRP	M2565257/97247465258036584031399 : A8F3CC282A39EF9D PRP: Verified PRP without proof (not generated)
2015-08-13	guru	F-ECM	Factor: 97247465258036584031399 / (ECM curve 2, B1=50000, B2=5000000)
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-10-14	lycorn	NF	no factor from 2^62 to 2^63
2012-06-17	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-04-14	James Heinrich	NF-PM1	B1=175000, B2=4112500, E=6
2011-01-10	Joss	NF-PM1	B1=50000
2011-01-03	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-01-29	Sturle Sunde	NF	no factor from 2^60 to 2^61