11 503 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 3 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
58918367	8	25.8	old
2402281573711	13	41.1	2008-08-26 19:58:35
316283332220969	15	48.2	2008-08-26 19:58:35

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	2638 / 9201

Estimated T-Level: 41.4 ⓘ

TF below 2^133 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	B85B5E55FB288885	3	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	B85B5E55FB288885	3	2966	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	C35B14028A1E963C	3	8108	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	C35B14028A1E963C	3	3937	5	3

History

Date	User	Type	Result
2025-03-16	masser	NF-PP1	Start=79/71, B1=430000000, B2=429570000000
2025-02-28	masser	NF-PP1	Start=6/5, B1=430000000, B2=429570000000
2025-01-23	masser	NF-PP1	Start=2/7, B1=430000000, B2=429570000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M11503/2402281573711/316283332220969/58918367 : C35B14028A1E963C
2023-01-20	-anonymous-	NF-PM1	B1=100000000000, B2=122192573512709700
2020-04-17	Oliver Kruse	C-PRP	M11503/58918367/2402281573711/316283332220969 : C35B14028A1E963C
2017-10-12	kkmrkkblmbrbk	C-PRP	M11503/58918367/2402281573711/316283332220969 : B85B5E55FB288885
2017-09-21	Oliver Kruse	C-PRP	M11503/58918367/2402281573711/316283332220969 : B85B5E55FB288885
2017-09-21	Oliver Kruse	C-PRP	M11503/58918367/2402281573711/316283332220969 : B85B5E55FB288885
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2011-02-05	Oscar Östlin	F	Factor: 141538507397242249937
2011-02-05	Oscar Östlin	F	Factor: 316283332220969
2011-02-05	Oscar Östlin	F	Factor: 18634897443777976637623
2008-08-26	-anonymous-	F-PM1	Factor: 316283332220969
2008-08-26	-anonymous-	F	Factor: 2402281573711