is 2 1786597 - 1
has 537820 decimal digits
takes 0.097 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
Actual26716.631668.6567%500000150000000.10155.0539%16.733070.2408%1.5841%
PrimeNet2570.010763.1579%80001400000.00122.8135%0.011964.1944%1.0365%
GPU722610.171965.5738%80001300000.00121.4928%0.173166.0877%0.5139%
Difference+6+16.4596+3.0829%+492000+14870000+0.1003+3.5611%+16.5600+4.1531%+4.1531%

Known prime factors (2 factors, 126.8 bits, 0.00709805% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1786597320058145974426171754.8298957200364
22 × 7 × 1307 × 244759
-13072447590.00260.00110.0020
178659746714637933573040069192271.9841307363606162247
3 × 435787868720749
2020-04-023435787868720749522.941,867,6783,488,302

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
178659714951400406885986151103914902427346702339126.814
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:33:59alpertronManual testing5000001500000012-
skipped known factor: 32005814597442617
--0.101--5.054%


Trial Factoring results:
No TF results for M1786597


ECM factoring results:

Old Calculation Method

Total ECM effort:17.772 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:17.772 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.3230.024%
25500000.75247.133%
302500000.04695.474%
3510000000.00299.788%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024016.53
500005000000181.240


Lucas-Lehmer results:
No L-L results for M1786597


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T15:38:56Oliver KruseGTX-2
32005814597442617
E5450EA6BD58BA__no
2017-11-05T01:00:50ATHec2-1xf
32005814597442617
E5450EA6BD58BA__no
2020-04-03T11:57:34mnd9mnd
32005814597442617
4671463793357304006919
74F561598D77031Cno
2020-04-05T12:26:08James HeinrichC2750
32005814597442617
4671463793357304006919
74F561598D77031Cno


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-11-06T10:16:11+00:00