5 522 833 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
808157921169638991937	21	69.5	2019-01-06 07:50:11

ECM

Digits	B1	Curves
25	50000	7 / 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)	1999-09-14	Sandro Menzel	A25AFFE6EF3ADF24	1612233
Verified (Factored)	2000-09-08	John Palmer	A25AFFE6EF3ADF24	4011095

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-01-06	ATH	9D91BA7E961F69AB	1	4149994	5	3
Verified	2019-01-09	Zero	9D91BA7E961F69AB	1	1623314	5	3

History

Date	User	Type	Result
2019-01-09	Zero	C-PRP	M5522833/808157921169638991937 : 9D91BA7E961F69AB PRP: Verified PRP without proof (not generated)
2019-01-06	ATH	C-PRP	M5522833/808157921169638991937 : 9D91BA7E961F69AB PRP: Verified PRP without proof (not generated)
2019-01-06	_p95holder_	F-ECM	Factor: 808157921169638991937 / (ECM curve 1, B1=50000, B2=5000000)
2018-07-05	ramgeis	NF	no factor from 2^67 to 2^68
2016-07-18	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-08-31	snme2pm1	NF	no factor from 2^65 to 2^66
2014-12-07	monst	NF	no factor from 2^64 to 2^65
2014-12-06	Nesowa	NF	no factor from 2^63 to 2^64
2009-04-23	Rob_Dee	NF-PM1	B1=65000, B2=1121250
2009-02-13	GrunwalderGIMP	NF	no factor from 2^62 to 2^63