1 270 651 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
55728135367835313759823	23	75.6	2014-03-03 19:24:38

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)		David Slowinski	1581	0
Verified (Factored)		Joel Armengaud	ABD297C138093581	0
Verified (Factored)	2002-09-07	S57483	ABD297C138093581	13395

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-29	Oliver Kruse	7E1C622960380A90	1	0	1	3
Verified	2017-10-21	kkmrkkblmbrbk	7E1C622960380A90	1	1206103	1	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2017-10-21	kkmrkkblmbrbk	C-PRP	M1270651/55728135367835313759823 : 7E1C622960380A90 PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1270651/55728135367835313759823 : 7E1C622960380A90 PRP: Verified PRP without proof (not generated)
2014-03-03	jim f in mn	F-ECM	Factor: 55728135367835313759823
2012-11-23	SRJ2877	NF-PM1	B1=2500000, B2=30000000, E=12
2012-10-13	dbaugh	NF	no factor from 2^62 to 2^63
2012-09-15	Axelsson	NF	no factor from 2^61 to 2^62
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61