1 902 611 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
3805223	7	21.9	old
15220889	8	23.9	2008-07-15 07:48:01
23267273453209	14	44.4	2008-09-30 13:30:27
393345644989814623417	21	68.4	2020-10-19 14:18:27

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	B09344764B035F40	3	0	1	3
Verified (Factored)	2017-11-09	kkmrkkblmbrbk	B09344764B035F40	3	1823445	1	3
Verified	2020-10-20	tottenhoff	71C12ED7458A437E	4	333438	5	3

History

Date	User	Type	Result
2021-06-30	Dylan Delgado	NF-PM1	B1=2000000, B2=262000000
2020-10-20	Ben Delo	CERT	PRP Certification Proof certified good
2020-10-20	tottenhoff	C-PRP	M1902611/3805223/15220889/23267273453209/393345644989814623417 : 71C12ED7458A437E PRP proof power = 7 PRP: Verified Proof certified good
2020-10-19	nordi	F-ECM	Factor: 393345644989814623417 / (ECM curve 1, B1=50000, B2=5000000, Sigma=642664849381032)
2017-11-09	kkmrkkblmbrbk	C-PRP	M1902611/3805223/15220889/23267273453209 : B09344764B035F40 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1902611/3805223/15220889/23267273453209 : B09344764B035F40 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-09-30	markr	F	Factor: 23267273453209
2008-07-15	J Feitsma	F	Factor: 15220889