6 526 141 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
525547789816534285921	21	68.8	2017-02-02 05:25:03

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)	1999-01-10	Joel Armengaud	70F533B68A57D06E	0
Verified (Factored)	2001-12-08	Rick Cummings	70F533B68A57D06E	797820

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-23	Chun sung soo	4F2C58BD653ED5BB	1	2166716	5	3
Verified	2018-10-05	ATH	4F2C58BD653ED5BB	1	1431228	5	3

History

Date	User	Type	Result
2018-10-05	ATH	C-PRP	M6526141/525547789816534285921 : 4F2C58BD653ED5BB PRP: Verified PRP without proof (not generated)
2017-12-23	Chun sung soo	C-PRP	M6526141/525547789816534285921 : 4F2C58BD653ED5BB PRP: Verified PRP without proof (not generated)
2017-02-02	arnaud	F-ECM	Factor: 525547789816534285921 / (ECM curve 1, B1=50000, B2=5000000)
2016-04-22	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-10-29	snme2pm1	NF	no factor from 2^65 to 2^66
2014-07-26	lycorn	NF	no factor from 2^64 to 2^65
2014-07-20	Nesowa	NF	no factor from 2^63 to 2^64
2012-04-13	kurly	NF-PM1	B1=75000, B2=1293750, E=6