6 221 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
555190029021937960947814145119	30	98.8	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1429 / 9201

Estimated T-Level: 40.8 ⓘ

TF below 2^130 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	6D965766ADC67B2E	1	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	6D965766ADC67B2E	1	2384	1	3
Verified	2020-04-17	Oliver Kruse	14EADB5C389D4D02	1	5774	5	3
Verified	2024-02-03	Wentao Huang	14EADB5C389D4D02	1	1171	5	3

History

Date	User	Type	Result
2024-02-03	Wentao Huang	C-PRP	M6221/555190029021937960947814145119 : 14EADB5C389D4D02 PRP: Verified PRP without proof (small exponent)
2023-07-31	-Anonymous-	NF-PM1	B1=40000000000, B2=169615672618692300
2021-08-01	ViliamF	NF-PM1	B1=500000000, B2=90500000000
2020-04-17	Oliver Kruse	C-PRP	M6221/555190029021937960947814145119 : 14EADB5C389D4D02 PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M6221/555190029021937960947814145119 : 6D965766ADC67B2E PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M6221/555190029021937960947814145119 : 6D965766ADC67B2E PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M6221/555190029021937960947814145119 : 6D965766ADC67B2E PRP without proof (not generated)