2 137 571 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
38476279	8	25.2	old
205206817	9	27.6	2008-07-14 20:20:43
8167547350873487	16	52.9	2014-08-27 11:22:25
1009370424297687461369	22	69.8	2022-01-20 15:35:36

ECM

Digits	B1	Curves
25	50000	125 / 280

Estimated T-Level: 22.2 ⓘ

TF below 2^69 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	7DA21A5726F84B4B	3	0	1	3
Verified (Factored)	2017-11-18	kkmrkkblmbrbk	7DA21A5726F84B4B	3	204770	1	3
Verified	2022-01-22	_p95holder_	7F44B1A1ECF8BBE3	4	343693	5	3
Verified	2022-01-26	RichD0	7F44B1A1ECF8BBE3	4	1249332	5	3

History

Date	User	Type	Result
2022-01-28	Ben Delo	CERT	PRP Certification Proof certified good
2022-01-26	RichD0	C-PRP	M2137571/38476279/205206817/8167547350873487/1009370424297687461369 : 7F44B1A1ECF8BBE3 PRP proof power = 7 PRP: Verified Proof certified good
2022-01-22	_p95holder_	C-PRP	M2137571/38476279/205206817/8167547350873487/1009370424297687461369 : 7F44B1A1ECF8BBE3 PRP: Verified PRP without proof (not generated)
2022-01-20	_p95holder_	F-ECM	Factor: 1009370424297687461369 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-18	kkmrkkblmbrbk	C-PRP	M2137571/38476279/205206817/8167547350873487 : 7DA21A5726F84B4B PRP: Verified PRP without proof (not generated)
2017-10-08	Oliver Kruse	C-PRP	M2137571/38476279/205206817/8167547350873487 : 7DA21A5726F84B4B PRP: Verified PRP without proof (not generated)
2016-03-26	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2014-08-27	TJAOI	F	Factor: 8167547350873487
2008-07-14	George Woltman	F-ECM	Factor: 205206817