2 486 971 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
526406741719241710901816239	27	88.8	2014-11-17 10:33:13

ECM

Digits	B1	Curves
25	50000	65 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Paul Whitmer	139F8B63904478FF	0
Verified (Factored)	1999-05-16	Oakwood Friends School	139F8B63904478FF	380501

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-14	Oliver Kruse	7B52E17E522AC035	1	565485	5	3
Verified	2017-11-29	ATH	7B52E17E522AC035	1	2446199	5	3

P-1 factors

Date	Factor	B1	B2
2014-11-17	526406741719241710901816239	2382500	0

History

Date	User	Type	Result
2022-08-31	USAFSS	NF-PM1	B1=480000, B2=452603970
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2017-11-29	ATH	C-PRP	M2486971/526406741719241710901816239 : 7B52E17E522AC035 PRP: Verified PRP without proof (not generated)
2017-10-14	Oliver Kruse	C-PRP	M2486971/526406741719241710901816239 : 7B52E17E522AC035 PRP: Verified PRP without proof (not generated)
2014-11-17	mikr	F-PM1	Factor: 526406741719241710901816239 / (P-1, B1=2382500)
2014-09-03	Joss	NF-PM1	B1=120808
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-10	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-22	Oscar Östlin	NF-PM1	B1=95000, B2=1947500, E=6
2010-12-22	Joss	NF-PM1	B1=20000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61