2 172 197 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
1062166554149777	16	49.9	old
41037928801604993191	20	65.2	2018-06-28 12:18:39

ECM

Digits	B1	Curves
25	50000	91 / 280

Estimated T-Level: 21.6 ⓘ

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)	2017-10-09	kkmrkkblmbrbk	C17DCF0CD1BA0F17	1	0	1	3
Verified (Factored)	2017-10-22	Oliver Kruse	C17DCF0CD1BA0F17	1	1795162	1	3
Verified	2018-06-28	_p95holder_	2F447E7B7628E9EA	2	907088	5	3
Verified	2018-06-29	Dt12	2F447E7B7628E9EA	2	1213618	5	3

History

Date	User	Type	Result
2018-06-29	Dt12	C-PRP	M2172197/1062166554149777/41037928801604993191 : 2F447E7B7628E9EA PRP: Verified PRP without proof (not generated)
2018-06-28	_p95holder_	C-PRP	M2172197/1062166554149777/41037928801604993191 : 2F447E7B7628E9EA PRP: Verified PRP without proof (not generated)
2018-06-28	TJAOI	F	Factor: 41037928801604993191 / TF: 65-66
2017-10-22	Oliver Kruse	C-PRP	M2172197/1062166554149777 : C17DCF0CD1BA0F17 PRP: Verified PRP without proof (not generated)
2017-10-09	kkmrkkblmbrbk	C-PRP	M2172197/1062166554149777 : C17DCF0CD1BA0F17 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12