is 2 16607 - 1
has 5000 decimal digits
takes 0.000 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
Actualunknown50000500000.000010.3757%0.000010.3757%10.3757%
PrimeNet2400.000062.5000%500100000.00003.5208%0.000063.8203%1.3203%
GPU722440.000165.9091%500100000.00001.4747%0.000166.4118%0.5028%
Difference-44-0.0001-65.9091%+49500+40000+0.0000+8.9010%-0.0001-56.0361%-56.0361%

Known prime factors (2 factors, 162.3 bits, 0.97752783% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16607126777839926.9183817
11 × 347
-113479.831e-101.013e-81.209e-8
166075828789776475001668464876092353652258852741135.4201754919544913290079022362886840986409
3 × 4457 × 77312561 × 1697630864051993265925339
2022-01-057731256116976308640519932659253391.060e+133.196e+135.970e+13

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
16607738961371846793749049371438391360457134813925315349162.338
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-02-06T16:46:18Lisander ViaeneManual testing5000050000-
skipped known factor: 126777839
--1.72792e-5--6.407%


Trial Factoring results:
No TF results for M16607


ECM factoring results:

Old Calculation Method

Total ECM effort:20.136 GHz-days
Estimated T-Level:35.879
DigitsB1CurvesCompleteFacMiss
20110002812 / 10028.1200.000%
25500002812 / 28010.0430.004%
302500002744 / 6404.2881.369%
3510000002277 / 15801.44123.655%
403000000826 / 47000.17683.882%

New Calculation Method

Total ECM effort:20.136 GHz-days
Estimated T-Level:35.879
DigitsB1CompleteFacMiss
2011000413.5960.000%
255000086.6150.000%
3025000014.7170.000%
3510000002.03613.051%
4030000000.23678.951%
45110000000.02497.636%
50440000000.00299.784%


ECM Summary

B1B2factorcurvesGHz-days
500005000000680.017
250000250000004670.581
10000001000000001,4517.216
30000003000000003875.773
30000003000000004396.549


Lucas-Lehmer results:
No L-L results for M16607


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21T19:17:25Oliver KrusePRP
126777839
69F2057312DA98__no
2017-09-21T21:28:34Oliver KruseManual testing
126777839
69F2057312DA98__no
2017-10-12T16:01:26kkmrkkblmbrbkManual testing
126777839
69F2057312DA98__no
2020-04-17T13:48:20Oliver KruseManual testing
126777839
34C3630FAE2419__no
2022-01-05T06:20:09SRJ2877LTOS
126777839
58287897764750016684648760923536522588527
34C3630FAE2419ACno


P-1 factor-bounds graph:
B1 = 50000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
100
101
102
103
104
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109
1010
1011
1012
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1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
TF factor-bounds graph:
220
230
240
250
260
270
280
290
2100
2110
2120
2130
2140
Last modified: 2022-02-06T16:46:18+00:00