1 895 083 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
39530732037520511	17	55.1	old
266374919753692755407	21	67.9	2021-07-19 18:01:49

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	3EBADB5C4047F57D	1	0	1	3
Verified (Factored)	2017-11-09	kkmrkkblmbrbk	3EBADB5C4047F57D	1	211236	1	3
Verified	2021-07-19	SRJ2877	94DB240353C9F3ED	2	1123118	5	3

History

Date	User	Type	Result
2022-08-30	USAFSS	NF-PM1	B1=651000, B2=730452492
2022-04-12	Lisander Viaene	NF-PM1	B1=500100
2021-07-19	Ben Delo	CERT	PRP Certification Proof certified good
2021-07-19	SRJ2877	C-PRP	M1895083/39530732037520511/266374919753692755407 : 94DB240353C9F3ED PRP proof power = 7 PRP: Verified Proof certified good
2021-07-19	_p95holder_	F-ECM	Factor: 266374919753692755407 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-09	kkmrkkblmbrbk	C-PRP	M1895083/39530732037520511 : 3EBADB5C4047F57D PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1895083/39530732037520511 : 3EBADB5C4047F57D PRP: Verified (Factored) PRP without proof (not generated)