is 2 1659817 - 1
has 499655 decimal digits
takes 0.078 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
Actual26717.901968.6567%500000150000000.08805.0093%17.990070.2268%1.5701%
PrimeNet2570.011663.1579%70001200000.00092.5664%0.012564.1034%0.9455%
GPU722610.185165.5738%7000700000.00071.1526%0.185865.9706%0.3968%
Difference+6+17.7169+3.0829%+493000+14930000+0.0873+3.8567%+17.8042+4.2562%+4.2562%

Known prime factors (3 factors, 168.0 bits, 0.01012043% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
165981793543435344571343.0892817884
22 × 659 × 1069
-65910691.364e-64.649e-59.152e-5
16598171250612932774818491856.79537673217372
22 × 3 × 7 × 59 × 131 × 58027
2015-04-20131580270.00610.00020.0004
16598173155508208713296743032168.09695055907028103
33 × 7 × 23 × 41 × 533341789
2018-01-144153334178939.6761.98293.7036

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
165981711698663001810430130233235709933199.884
1659817295177078101032170993679166795847134111.185
16598173946319375293950092644640289316422624738124.892
165981736915227133183349352958427042461567871591358829287
9
51167.981
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-04-20T21:08:00alpertronManual testing50000015000000121856.7950.0340.1560.0685.009%


Trial Factoring results:
No TF results for M1659817


ECM factoring results:

Old Calculation Method

Total ECM effort:14.882 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.882 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024814.70
50000500000030.178


Lucas-Lehmer results:
No L-L results for M1659817


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T20:32:46Oliver KruseGTX-2
9354343534457
125061293277481849
7F038A73B36C51__no
2017-11-02T17:34:44kkmrkkblmbrbkc4.xlarge
9354343534457
125061293277481849
7F038A73B36C51__no
2018-01-15T03:24:52ATHec2-8x
9354343534457
125061293277481849
315550820871329674303
26D2FFDBA5D364__no
2018-01-15T15:44:00kkmrkkblmbrbkc4.xlarge
9354343534457
125061293277481849
315550820871329674303
26D2FFDBA5D364__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2019-12-16T13:26:56+00:00