1 973 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 4 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
122327	6	16.9	old
4651860481	10	32.1	old
1296592759951	13	40.2	old
1497016087610401	16	50.4	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	68063 / 194238

Estimated T-Level: 61.8 ⓘ

TF below 2^200 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	D338A2DA27B7BBA5	4	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	D338A2DA27B7BBA5	4	0	1	3
Verified	2017-12-07	ATH	D338A2DA27B7BBA5	4	1026	1	3
Verified	2020-04-17	Oliver Kruse	ED39AA9606EAF58F	4	962	5	3
Verified	2020-08-12	_p95holder_	ED39AA9606EAF58F	4	1696	5	3

History

Date	User	Type	Result
2023-02-13	mikr	NF-PM1	B1=500000000000, B2=3291057749991451440
2021-07-26	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2020-08-12	_p95holder_	C-PRP	M1973/122327/4651860481/1296592759951/1497016087610401 : ED39AA9606EAF58F PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1973/122327/4651860481/1296592759951/1497016087610401 : ED39AA9606EAF58F PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M1973/122327/4651860481/1296592759951/1497016087610401 : D338A2DA27B7BBA5 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M1973/122327/4651860481/1296592759951/1497016087610401 : D338A2DA27B7BBA5 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M1973/known_factors : D338A2DA27B7BBA5 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12