2 563 237 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
92716954040853255645823	23	76.3	2010-05-10 08:19:58

ECM

Digits	B1	Curves
25	50000	182 / 280

Estimated T-Level: 23.3 ⓘ

TF below 2^72 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-02-08	Adams Douglas	44811129E29ECCDF	0
Verified (Factored)	1999-07-26	Thomas Philipp	44811129E29ECCDF	760980

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-15	Oliver Kruse	299CEF31FE06DF1A	1	1912287	5	3
Verified	2017-12-01	kkmrkkblmbrbk	299CEF31FE06DF1A	1	1299550	5	3

History

Date	User	Type	Result
2023-01-25	USAFSS	NF-PM1	B1=225000, B2=238697550
2022-03-11	LordJulius	NF	no factor from 2^1 to 2^60
2017-12-01	kkmrkkblmbrbk	C-PRP	M2563237/92716954040853255645823 : 299CEF31FE06DF1A PRP: Verified PRP without proof (not generated)
2017-10-15	Oliver Kruse	C-PRP	M2563237/92716954040853255645823 : 299CEF31FE06DF1A PRP: Verified PRP without proof (not generated)
2010-05-10	KAMCOBILL	F-ECM	Factor: 92716954040853255645823
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61