1 806 251 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
3612503	7	21.8	old
266435654031344076887	21	67.9	2020-10-05 07:46:38
1254092859361788461647	22	70.1	2020-10-15 01:41:20
1200724890291139991363519	25	80.0	2019-09-17 00:24:10

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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)	2017-10-03	Oliver Kruse	A51720BD1C85A51B	1	0	1	3
Verified (Factored)	2017-11-05	ATH	A51720BD1C85A51B	1	474100	1	3
Verified (Factored)	2019-09-17	mnd9	0CE86BB044F6C95B	2	1233355	5	3
Verified (Factored)	2019-09-17	ATH	0CE86BB044F6C95B	2	1511784	5	3
Verified (Factored)	2020-10-05	M Miller	0CE86BB044F6C95B	3	1678222	5	3
Verified (Factored)	2020-10-05	Kirill Frolov	0CE86BB044F6C95B	3	1774009	5	3
Verified	2020-10-15	tottenhoff	0CE86BB044F6C95B	4	589910	5	3

History

Date	User	Type	Result
2020-10-15	tottenhoff	C-PRP	M1806251/3612503/1200724890291139991363519/266435654031344076887/1254092859361788461647 : 0CE86BB044F6C95B PRP: Verified PRP without proof (not generated)
2020-10-15	nordi	F-ECM	Factor: 1254092859361788461647 / (ECM curve 2, B1=50000, B2=5000000, Sigma=734614809215734)
2020-10-05	Kirill Frolov	C-PRP	M1806251/3612503/266435654031344076887/1200724890291139991363519 : 0CE86BB044F6C95B PRP: Verified PRP without proof (not generated)
2020-10-05	curtisc	CERT	PRP Certification Proof certified good
2020-10-05	M Miller	C-PRP	M1806251/3612503/1200724890291139991363519/266435654031344076887 : 0CE86BB044F6C95B PRP proof power = 7 PRP: Verified (Factored) Proof certified good
2020-10-05	nordi	F-ECM	Factor: 266435654031344076887 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7849581937938828)
2019-09-17	ATH	C-PRP	M1806251/3612503/1200724890291139991363519 : 0CE86BB044F6C95B PRP: Verified PRP without proof (not generated)
2019-09-17	mnd9	C-PRP	M1806251/3612503/1200724890291139991363519 : 0CE86BB044F6C95B PRP: Verified PRP without proof (not generated)
2019-09-17	Chang Chia-Tche	F-ECM	Factor: 1200724890291139991363519 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-05	ATH	C-PRP	M1806251/3612503 : A51720BD1C85A51B PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1806251/3612503 : A51720BD1C85A51B PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12