is 2 2568793 - 1
has 773284 decimal digits
takes 0.178 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26711.567367.1642%3600003174286501.77368.0156%13.340969.7962%
Target2630.621365.0794%1200014400000.00901.4802%0.630365.5963%
Difference+4+10.9460+2.0848%+348000+315988650+1.7646+6.5354%+12.7105+4.1999%

Known prime factors (3 factors, 169.9 bits, 0.00661518% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2568793102751721926.61520
22 × 5
-453.495e-124.078e-78.187e-7
25687931311499847284868720232166.83025527550240227
3 × 7 × 557 × 619 × 1049 × 3361
2019-01-041049336111.2230.00010.0002
25687931058238022164954721392732476.48620597962197906852
22 × 3 × 11 × 127 × 157 × 37997 × 205967
2019-01-04379972059677,830.10.00470.0078

4 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-01-02alpertron2000000200000044143.3160.2010.3560.4023.513%
2022-09-01harleei5-5250U_1600360000317428650-
skipped known factor: 102751721
skipped known factor: 131149984728486872023
skipped known factor: 105823802216495472139273
--1.774--8.016%


Trial Factoring results:
No TF results for M2568793


ECM factoring results:
Total ECM effort:0.277 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.277


Lucas-Lehmer results:
No L-L results for M2568793


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-15Oliver KruseGTX-2
102751721
054940C1BE3392__no
2017-12-01kkmrkkblmbrbkc4.xlarge
102751721
054940C1BE3392__no
2019-01-04Oliver KruseGTX-3
102751721
131149984728486872023
105823802216495472139273
054940C1BE3392E6no
2019-01-21ANONYMOUSdory
102751721
131149984728486872023
105823802216495472139273
054940C1BE3392E6no


P-1 factor-bounds graph:
B1 = 360000, B2 = 317428650 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 360000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67.9
ECM T-Level=0.58 ~= -15-bit
250
260
270
280
Last modified: 2023-06-05T21:50:05+00:00