2 149 573 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
340281705047	12	38.3	old
20516298558281	14	44.2	2008-09-30 14:36:33
16551070329140934605783	23	73.8	2021-12-19 09:00:49

ECM

Digits	B1	Curves
25	50000	99 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-08	Oliver Kruse	725BADF7C15D41AA	2	0	1	3
Verified (Factored)	2017-11-18	ATH	725BADF7C15D41AA	2	573973	1	3
Verified	2021-12-21	_p95holder_	0546EF7950BB3DA8	3	1715770	5	3
Verified	2021-12-25	Joe S.	0546EF7950BB3DA8	3	917284	5	3

History

Date	User	Type	Result
2021-12-25	Ben Delo	CERT	PRP Certification Proof certified good
2021-12-25	Joe S.	C-PRP	M2149573/340281705047/20516298558281/16551070329140934605783 : 0546EF7950BB3DA8 PRP proof power = 7 PRP: Verified Proof certified good
2021-12-21	_p95holder_	C-PRP	M2149573/340281705047/20516298558281/16551070329140934605783 : 0546EF7950BB3DA8 PRP: Verified PRP without proof (not generated)
2021-12-19	_p95holder_	F-ECM	Factor: 16551070329140934605783 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-18	ATH	C-PRP	M2149573/340281705047/20516298558281 : 725BADF7C15D41AA PRP: Verified PRP without proof (not generated)
2017-10-08	Oliver Kruse	C-PRP	M2149573/340281705047/20516298558281 : 725BADF7C15D41AA PRP: Verified PRP without proof (not generated)
2016-03-20	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-09-30	markr	F	Factor: 20516298558281