is 2 1971601 - 1
has 593512 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.071068.6567%----15.071068.6567%0.0000%
PrimeNet2580.019563.7931%80001400000.00142.4720%0.020964.6881%0.8950%
GPU722620.311666.1290%80001000000.00121.1961%0.312866.5342%0.4051%
Difference+5+14.7594+2.5277%-8000-100000-0.0012-1.1961%+14.7581+2.1226%+2.1226%

Known prime factors (2 factors, 107.6 bits, 0.00545629% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
197160123186027771031.111588
22 × 3 × 72
-49491.636e-104.672e-69.507e-6
19716011043382368276079429088572476.46626460281980889628
22 × 3 × 2205023498407469
2021-11-214220502349840746910,26211,453,44321,391,843

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
197160124191892565577544669573329809588933107.576
P-1 results:
No P-1 results for M1971601


Trial Factoring results:
No TF results for M1971601


ECM factoring results:

Old Calculation Method

Total ECM effort:3.438 GHz-days
Estimated T-Level:1.950
DigitsB1CurvesCompleteFacMiss
201100039 / 1000.39067.573%
255000039 / 2800.13986.976%

New Calculation Method

Total ECM effort:3.438 GHz-days
Estimated T-Level:1.950
DigitsB1CompleteFacMiss
20110001.28127.771%
25500000.11689.086%
302500000.00799.290%


ECM Summary

B1B2factorcurvesGHz-days
500005000000201.689
50000500000050.422
50000629330470.653
50000675000070.674


Lucas-Lehmer results:
No L-L results for M1971601


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T10:44:39Oliver KruseGTX-1
2318602777
7408ED904FAA96__no
2017-11-12T04:30:51kkmrkkblmbrbkc4.xlarge
2318602777
7408ED904FAA96__no
2021-11-21T08:18:14MarkSdesktop-i7
2318602777
104338236827607942908857
3313337F17C093D0no


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2022-05-10T11:34:21+00:00