is 2 1970237 - 1
has 593101 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L626D71E51B834382double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.081468.6567%----15.081468.6567%0.0000%
PrimeNet2580.019563.7931%80001400000.00142.4717%0.020964.6880%0.8949%
GPU722620.311866.1290%80001000000.00121.1959%0.313166.5341%0.4051%
Difference+5+14.7696+2.5277%-8000-100000-0.0012-1.1959%+14.7683+2.1226%+2.1226%

Known prime factors (2 factors, 140.2 bits, 0.00711778% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19702372045432202654027191857.50551908278107
3 × 7 × 2471822767
1999-01-10724718227670.010112.83923.980
197023780311347949920523097467272582.7322038113890611142799
3 × 7 × 13 × 67 × 787 × 141584681047
2021-12-08787141584681047811,228735.431,373.6

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1970237164271417335319926509043119143795154715071343140.237
P-1 results:
No P-1 results for M1970237


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-10T00:00:00ANONYMOUSv4_computers??57.505180.0000.2630.001


ECM factoring results:

Old Calculation Method

Total ECM effort:3.940 GHz-days
Estimated T-Level:2.000
DigitsB1CurvesCompleteFacMiss
201100040 / 1000.40066.897%
255000040 / 2800.14386.666%

New Calculation Method

Total ECM effort:3.940 GHz-days
Estimated T-Level:2.000
DigitsB1CompleteFacMiss
20110001.35525.784%
25500000.12188.637%
302500000.00799.263%


ECM Summary

B1B2factorcurvesGHz-days
500005000070.355
500005000000131.098
50000500000060.507
500006329864141.309
50000670249770.672


Lucas-Lehmer results:
No L-L results for M1970237


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T10:22:15Oliver KruseGTX-2
204543220265402719
AA55A7A90CD8A4__no
2017-11-12T06:55:46kkmrkkblmbrbkold
204543220265402719
AA55A7A90CD8A4__no
2021-12-08T22:59:07MarkSdesktop-i7
204543220265402719
8031134794992052309746727
79479689764BAE__no


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
2
250
260
270
280
290
2100
Last modified: 2022-04-07T13:13:03+00:00