is 2 1699877 - 1
has 511714 decimal digits
takes 0.080 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
Actual26717.480068.6567%500000150000000.08805.0237%17.568170.2313%1.5746%
PrimeNet2570.011363.1579%80001300000.00102.7313%0.012364.1641%1.0063%
GPU722610.180765.5738%70001000000.00081.3013%0.181566.0218%0.4480%
Difference+6+17.2993+3.0829%+493000+14900000+0.0872+3.7224%+17.3865+4.2096%+4.2096%

Known prime factors (2 factors, 111.5 bits, 0.00655952% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
169987711346305002071340.045333739
74 × 139
-240124011.067e-70.00020.0003
169987732442319600863492343512271.458954254913763275
34 × 52 × 17 × 27719823203
2019-05-028127719823203490.43103.06192.49

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1699877368100453166031049068416659701065734111.504
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:18:55alpertronManual testing5000001500000012-
skipped known factor: 1134630500207
--0.088--5.024%


Trial Factoring results:
No TF results for M1699877


ECM factoring results:

Old Calculation Method

Total ECM effort:15.989 GHz-days
Estimated T-Level:24.804
DigitsB1CurvesCompleteFacMiss
2011000269 / 1002.6906.697%
2550000269 / 2800.96138.196%

New Calculation Method

Total ECM effort:15.989 GHz-days
Estimated T-Level:24.804
DigitsB1CompleteFacMiss
20110008.6770.017%
25500000.78445.646%
302500000.04895.285%
3510000000.00299.779%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026815.93
50000500000010.059


Lucas-Lehmer results:
No L-L results for M1699877


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:16:41alpertronManual testing
1134630500207
7FB40490BC521F__no
2017-10-18T17:32:01Oliver KruseThreadripper
1134630500207
7FB40490BC521F__no
2019-05-03T09:22:11artorollofourth
1134630500207
3244231960086349234351
20BC174451506331no
2019-05-04T06:02:30kkmrkkblmbrbkc5.large
1134630500207
3244231960086349234351
20BC174451506331no


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
1010
1011
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2020-03-09T11:16:08+00:00