4 381 499 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
29272939050735132647	20	64.7	2012-01-07 19:13:47

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Dax Prather	4EA3F7A707CCB75D	0
Verified (Factored)	1999-12-08	Henri Karrenbeld	4EA3F7A707CCB75D	3858901

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	064461F6625A6092	1	0	1	3
Verified	2018-02-05	ATH	064461F6625A6092	1	788462	1	3

History

Date	User	Type	Result
2018-02-05	ATH	C-PRP	M4381499/29272939050735132647 : 064461F6625A6092 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4381499/29272939050735132647 : 064461F6625A6092 PRP: Verified PRP without proof (not generated)
2012-01-07	Squeeky_Squirrel	F-PM1	Factor: 29272939050735132647
2010-11-14	markr	NF	no factor from 2^61 to 2^62
2009-08-13	Carsten Kossendey	NF-PM1	B1=25000, B2=356250