2 566 411 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
16050439278904870791685067833	29	93.7	2016-05-21 15:57:30

ECM

Digits	B1	Curves
25	50000	18 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Joe Decker	E6E7B60081B51ACB	0
Bad	1999-05-30	Hannu Kalli	B5C85FD3C18FAC13	2466928
Verified (Factored)	1999-09-14	Floris Looyesteyn	E6E7B60081B51ACB	2017475

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-15	Oliver Kruse	00EEFCF137D3BD42	1	2032311	5	3
Verified	2017-12-02	trebor	00EEFCF137D3BD42	1	758500	5	3

P-1 factors

Date	Factor	B1	B2
2016-05-21	16050439278904870791685067833	3200000	112000000

History

Date	User	Type	Result
2017-12-02	trebor	C-PRP	M2566411/16050439278904870791685067833 : 00EEFCF137D3BD42 PRP: Verified PRP without proof (not generated)
2017-10-15	Oliver Kruse	C-PRP	M2566411/16050439278904870791685067833 : 00EEFCF137D3BD42 PRP: Verified PRP without proof (not generated)
2016-05-21	mikr	F-PM1	Factor: 16050439278904870791685067833 / (P-1, B1=3200000, B2=112000000, E=12)
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-08	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-17	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-04-14	James Heinrich	NF-PM1	B1=175000, B2=4112500, E=6
2011-01-10	Joss	NF-PM1	B1=50000
2011-01-03	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-01-29	Sturle Sunde	NF	no factor from 2^60 to 2^61