31 029 827 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
470297443489971420074041	24	78.6	2021-09-23 05:38:30

ECM

Digits	B1	Curves
25	50000	4 / 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)	2006-02-01	EDNY	1BCB01B09FD6EE3F	21879652
Bad	2013-09-06	Lilith	73E931BA994BEA7F	0
Verified (Factored)	2013-12-27	forrest-lumpkin	1BCB01B09FD6EE3F	10627535

History

Date	User	Type	Result
2021-09-23	ATH	F-PP1	Start=2/7, B1=300000, B2=12300000, Factor: 470297443489971420074041
2019-06-25	LaurV	NF	no factor from 2^71 to 2^72
2019-01-01	ramgeis	NF	no factor from 2^70 to 2^71
2013-12-27	forrest-lumpkin	C-LL	1BCB01B09FD6EE3F
2013-09-06	Lilith	C-LL	73E931BA994BEA7F
2013-03-27	bcp19	NF	no factor from 2^69 to 2^70
2012-05-08	bcp19	NF	no factor from 2^68 to 2^69
2011-05-24	Ungelovende	NF	no factor from 2^67 to 2^68