2 011 861 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
3701824241	10	31.8	old
795630669671	12	39.5	2008-07-15 07:49:18
12077535551927	14	43.5	2008-08-26 20:20:30
5974551496461980561	19	62.4	2016-01-21 18:00:04

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	115 / 640

Estimated T-Level: 25.9 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	FF0D8E6F317845C2	4	0	1	3
Verified	2017-10-20	Oliver Kruse	FF0D8E6F317845C2	4	1680122	1	3

P-1 factors

Date	Factor	B1	B2
2016-01-21	5974551496461980561	500000	15000000

History

Date	User	Type	Result
2017-10-20	Oliver Kruse	C-PRP	M2011861/3701824241/795630669671/12077535551927/5974551496461980561 : FF0D8E6F317845C2 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2011861/12077535551927/3701824241/5974551496461980561/795630669671 : FF0D8E6F317845C2 PRP: Verified PRP without proof (not generated)
2016-01-21	alpertron	F-PM1	Factor: 5974551496461980561 / (P-1, B1=500000, B2=15000000, E=12)
2008-08-26	-Anonymous-	F	Factor: 12077535551927
2008-07-15	J Feitsma	F	Factor: 795630669671