5 559 473 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
1975988685816809174474328457	28	90.7	2015-06-30 16:31:20

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)	1999-08-31	Goede Schueler/Christoph Steinbeck	72DDA9DC71823700	5015725
Verified (Factored)	2001-02-04	Stephen Wood	72DDA9DC71823700	3262605

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	15D537EDDF39D336	1	0	1	3
Verified	2018-07-07	Battlemaxx	15D537EDDF39D336	1	1346040	1	3

History

Date	User	Type	Result
2018-07-07	Battlemaxx	C-PRP	M5559473/1975988685816809174474328457 : 15D537EDDF39D336 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M5559473/1975988685816809174474328457 : 15D537EDDF39D336 PRP: Verified PRP without proof (not generated)
2015-06-30	Sid & Andy	F-ECM	Factor: 1975988685816809174474328457
2014-12-17	monst	NF	no factor from 2^64 to 2^65
2014-12-16	Nesowa	NF	no factor from 2^63 to 2^64
2010-05-04	Squeeky_Squirrel	NF-PM1	B1=65000, B2=1121250, E=6
2009-04-23	GrunwalderGIMP	NF	no factor from 2^62 to 2^63