14 563 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
251390007148528607	18	57.8	old

P-1 factors

Date	Factors	B1	B2
2024-02-09	No new factors discovered	100000000000	122154521813133808

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1704 / 9201

Estimated T-Level: 40.9 ⓘ

TF below 2^131 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	C579493F8A34DD66	1	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	C579493F8A34DD66	1	2324	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	CE5C8D3F225FD88E	1	609	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	CE5C8D3F225FD88E	1	5909	5	3

History

Date	User	Type	Result
2025-02-07	masser	NF-PP1	Start=123/41, B1=355000000, B2=354645000000
2025-02-06	masser	NF-PP1	Start=2/7, B1=355000000, B2=354645000000
2025-01-17	masser	NF-PP1	Start=6/5, B1=355000000, B2=354645000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M14563/251390007148528607 : CE5C8D3F225FD88E
2024-02-09	Anton Repko	F-PM1	Factor: 251390007148528607 / B1=100000000000, B2=122154521813133810
2023-05-25	JacobZ	NF-PM1	B1=7500000000, B2=29520458628010350
2020-04-17	Oliver Kruse	C-PRP	M14563/251390007148528607 : CE5C8D3F225FD88E
2017-10-12	kkmrkkblmbrbk	C-PRP	M14563/251390007148528607 : C579493F8A34DD66
2017-09-21	Oliver Kruse	C-PRP	M14563/251390007148528607 : C579493F8A34DD66
2017-09-21	Oliver Kruse	C-PRP	M14563/251390007148528607 : C579493F8A34DD66