220 243 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
1795861423	10	30.7	old
297943135104179607112601105303	30	97.9	2019-12-23 11:25:31

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	224 / 1566

Estimated T-Level: 30.7 ⓘ

TF below 2^97 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-22	Oliver Kruse	9CF69AF57FB820D3	1	0	1	3
Verified (Factored)	2017-10-12	kkmrkkblmbrbk	9CF69AF57FB820D3	1	73687	1	3
Verified	2019-12-23	ATH	FA7547999B05E0A2	2	115065	5	3
Verified	2019-12-24	mnd9	FA7547999B05E0A2	2	202141	5	3

History

Date	User	Type	Result
2022-03-06	Oliver Kruse	NF-PM1	B1=30000000, B2=10070832992220
2021-06-07	Oliver Kruse	NF-PM1	B1=30000000, B2=3000000000
2019-12-24	mnd9	C-PRP	M220243/1795861423/297943135104179607112601105303 : FA7547999B05E0A2 PRP: Verified PRP without proof (small exponent)
2019-12-23	ATH	C-PRP	M220243/1795861423/297943135104179607112601105303 : FA7547999B05E0A2 PRP: Verified PRP without proof (small exponent)
2019-12-23	TJAOI	F-ECM	Factor: 297943135104179607112601105303 / (ECM curve 23, B1=250000, B2=25000000)
2017-10-12	kkmrkkblmbrbk	C-PRP	M220243/1795861423 : 9CF69AF57FB820D3 PRP: Verified PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M220243/1795861423 : 9CF69AF57FB820D3 PRP: Verified PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M220243/1795861423 : 9CF69AF57FB820D3 PRP without proof (not generated)