2 142 431 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
17139449	8	24.0	old
53760707637868537	17	55.6	2015-02-01 14:48:09
1552693654427665601	19	60.4	2016-02-05 12:49:38

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	098F5B6EDD311EEA	1	0	1	3
Verified	2017-10-17	Oliver Kruse	A44D72E50CB599F9	3	1866713	5	3
Verified	2017-11-18	kkmrkkblmbrbk	A44D72E50CB599F9	3	1624080	5	3

History

Date	User	Type	Result
2017-11-18	kkmrkkblmbrbk	C-PRP	M2142431/17139449/53760707637868537/1552693654427665601 : A44D72E50CB599F9 PRP: Verified PRP without proof (not generated)
2017-10-17	Oliver Kruse	C-PRP	M2142431/17139449/53760707637868537/1552693654427665601 : A44D72E50CB599F9 PRP: Verified PRP without proof (not generated)
2017-10-08	Oliver Kruse	C-PRP	M2142431/17139449/53760707637868537/1552693654427665601 : 098F5B6EDD311EEA PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2016-02-05	TJAOI	F	Factor: 1552693654427665601 / TF: 60-61
2015-02-01	TJAOI	F	Factor: 53760707637868537 / TF: 55-56