1 945 319 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
3890639	7	21.9	old
15562553	8	23.9	2008-07-15 07:48:32
2257709807135454081439	22	70.9	2021-01-02 03:46:48

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	56 / 640

Estimated T-Level: 25.4 ⓘ

TF below 2^80 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	6B76D66B852EB51C	2	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	6B76D66B852EB51C	2	383675	1	3
Verified	2021-01-03	Niels_Mache_Nextcloud	0883092003C89826	3	555422	5	3

History

Date	User	Type	Result
2021-01-03	argilo	CERT	PRP Certification Proof certified good
2021-01-03	Niels_Mache_Nextcloud	C-PRP	M1945319/3890639/15562553/2257709807135454081439 : 0883092003C89826 PRP proof power = 7 PRP: Verified Proof certified good
2021-01-02	_p95holder_	F-ECM	Factor: 2257709807135454081439 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1945319/3890639/15562553 : 6B76D66B852EB51C PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1945319/3890639/15562553 : 6B76D66B852EB51C PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 15562553