11 173 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
268153	6	18.0	old
1152299012229294719	19	60.0	2008-08-29 02:24:27

P-1 factors

Date	Factors	B1	B2
2022-12-29	No new factors discovered	100000000000	122192573512709696

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	4760 / 9201

Estimated T-Level: 42.6 ⓘ

TF below 2^136 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	723EFFDAC048D655	2	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	723EFFDAC048D655	2	3711	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	E9C8C989825CAECD	2	3012	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	E9C8C989825CAECD	2	2298	5	3

History

Date	User	Type	Result
2025-02-22	masser	NF-PP1	Start=186/41, B1=640000000, B2=639360000000
2025-02-13	masser	NF-PP1	Start=6/5, B1=640000000, B2=639360000000
2025-01-25	masser	NF-PP1	Start=2/7, B1=640000000, B2=639360000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M11173/1152299012229294719/268153 : E9C8C989825CAECD
2022-12-29	Anton Repko	F-PM1	Factor: 1152299012229294719 / B1=100000000000, B2=122192573512709700
2022-03-01	LordJulius	NF-PM1	B1=1000000000, B2=1325665992500850
2020-04-17	Oliver Kruse	C-PRP	M11173/268153/1152299012229294719 : E9C8C989825CAECD
2017-10-12	kkmrkkblmbrbk	C-PRP	M11173/268153/1152299012229294719 : 723EFFDAC048D655
2017-09-21	Oliver Kruse	C-PRP	M11173/268153/1152299012229294719 : 723EFFDAC048D655
2017-09-21	Oliver Kruse	C-PRP	M11173/268153/1152299012229294719 : 723EFFDAC048D655
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2008-08-29	-anonymous-	F-ECM	Factor: 1152299012229294719