6 599 861 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
158188723447477894487	21	67.1	2016-12-29 01:34:28

ECM

Digits	B1	Curves
25	50000	5 / 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)	1999-03-15	Brian Schmid	A698ECA0F76286CC	0
Verified (Factored)	2001-04-21	Graeme Pope	A698ECA0F76286CC	3222527

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-29	Oliver Kruse	2420D51D9C778EC3	1	2834867	5	3
Verified	2018-11-03	oodaira	2420D51D9C778EC3	1	3808356	5	3

History

Date	User	Type	Result
2018-11-03	oodaira	C-PRP	M6599861/158188723447477894487 : 2420D51D9C778EC3 PRP: Verified PRP without proof (not generated)
2017-12-29	Oliver Kruse	C-PRP	M6599861/158188723447477894487 : 2420D51D9C778EC3 PRP: Verified PRP without proof (not generated)
2016-12-29	ATH	F-ECM	Factor: 158188723447477894487 / (ECM curve 2, B1=50000, B2=5000000)
2016-05-13	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-11-03	snme2pm1	NF	no factor from 2^65 to 2^66
2014-07-07	lycorn	NF	no factor from 2^64 to 2^65
2014-07-05	Denial140	NF	no factor from 2^63 to 2^64
2012-11-19	Nesowa	NF-PM1	B1=80000, B2=1340000, E=6
2009-06-21	Carsten Kossendey	NF-PM1	B1=35000, B2=516250