2 203 741 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 4 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
16122216557441	14	43.9	old
20247156923831	14	44.2	2008-09-30 14:36:39
488034624316423	15	48.8	2014-04-15 11:38:18
22915059615822631	17	54.3	2014-11-18 12:05:48

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	134 / 640

Estimated T-Level: 26.0 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-10	Oliver Kruse	6FA3A6CE29E2B2F4	1	0	1	3
Verified	2017-10-18	Oliver Kruse	F666AB53AB2D1FDE	4	89175	5	3
Verified	2017-11-20	kkmrkkblmbrbk	F666AB53AB2D1FDE	4	187545	5	3

History

Date	User	Type	Result
2017-11-20	kkmrkkblmbrbk	C-PRP	M2203741/16122216557441/20247156923831/488034624316423/22915059615822631 : F666AB53AB2D1FDE PRP: Verified PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M2203741/16122216557441/20247156923831/488034624316423/22915059615822631 : F666AB53AB2D1FDE PRP: Verified PRP without proof (not generated)
2017-10-10	Oliver Kruse	C-PRP	M2203741/known_factors : 6FA3A6CE29E2B2F4 PRP: Verified PRP without proof (not generated)
2016-04-10	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2014-11-18	TJAOI	F	Factor: 22915059615822631 / TF: 54-55
2014-04-15	TJAOI	F	Factor: 488034624316423
2008-09-30	markr	F	Factor: 20247156923831