2 203 457 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 5 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
436284487	9	28.7	old
8545006247	10	33.0	2008-07-14 20:21:54
100581109133807	15	46.5	2014-02-13 14:52:33
1823372491250263	16	50.7	2014-06-05 11:44:53
3801353295671133359	19	61.7	2016-05-25 11:04:09

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	164 / 640

Estimated T-Level: 26.3 ⓘ

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	2017-09-20	kkmrkkblmbrbk	4D3FA7B10CEB1ED8	5	0	1	3
Verified	2017-10-25	Oliver Kruse	4D3FA7B10CEB1ED8	5	1980312	1	3

History

Date	User	Type	Result
2017-10-25	Oliver Kruse	C-PRP	M2203457/436284487/8545006247/100581109133807/1823372491250263/3801353295671133359 : 4D3FA7B10CEB1ED8 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M2203457/known_factors : 4D3FA7B10CEB1ED8 PRP: Verified PRP without proof (not generated)
2016-05-25	TJAOI	F	Factor: 3801353295671133359 / TF: 61-62
2016-04-09	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2014-06-05	TJAOI	F	Factor: 1823372491250263
2014-02-13	TJAOI	F	Factor: 100581109133807
2008-07-14	George Woltman	F-ECM	Factor: 8545006247