is 2 1718701 - 1
has 517381 decimal digits
takes 0.081 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
Actual26717.288668.6567%500000150000000.08805.0304%17.376670.2334%1.5767%
PrimeNet2570.011263.1579%80001400000.00102.7929%0.012264.1869%1.0290%
GPU722610.178765.5738%70001100000.00091.3434%0.179666.0363%0.4625%
Difference+6+17.1099+3.0829%+493000+14890000+0.0872+3.6869%+17.1970+4.1971%+4.1971%

Known prime factors (3 factors, 158.7 bits, 0.00923289% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
171870110312207823.2983
3
-136.506e-137.568e-81.389e-7
17187011745297310766469383672167.24250773732917083
11 × 723959 × 6375767
2019-05-27723959637576732.7340.07040.1005
17187013265548444395224010392168.14695000481305219
7 × 59 × 230025378463
2020-05-045923002537846348.225855.221,597.3

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
171870117997867145167160943567459692890.540
171870133675011527131539806511830732891.444
17187015699352918180611945701213664035208976331341135.388
171870158772907058332533770743675454759530252186466179148158.686
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:30:55alpertronManual testing5000001500000012-
skipped known factor: 10312207
--0.088--5.030%


Trial Factoring results:
No TF results for M1718701


ECM factoring results:

Old Calculation Method

Total ECM effort:16.186 GHz-days
Estimated T-Level:24.857
DigitsB1CurvesCompleteFacMiss
2011000272 / 1002.7206.498%
2550000272 / 2800.97137.788%

New Calculation Method

Total ECM effort:16.186 GHz-days
Estimated T-Level:24.857
DigitsB1CompleteFacMiss
20110008.7740.015%
25500000.79345.248%
302500000.04995.234%
3510000000.00299.777%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024214.40
50000500000020.119
500005000000281.666


Lucas-Lehmer results:
No L-L results for M1718701


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:37alpertronManual testing
10312207
43720E0EC52DC2__no
2017-10-19T03:52:41Oliver KruseGTX-1
10312207
43720E0EC52DC2__no
2019-05-30T02:00:47fre_gamesgpu
10312207
174529731076646938367
C1F68B73C9E48165no
2019-05-30T02:23:55ATHec2-PRPCFDC
10312207
174529731076646938367
C1F68B73C9E48165no
2019-05-30T22:07:50Daniil Tsarkovtsar1
10312207
174529731076646938367
C1F68B73C9E48165no
2020-05-05T00:02:29CrypticCluecruncher
10312207
174529731076646938367
326554844439522401039
C1F68B73C9E48165no


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
1012
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2020-05-05T00:02:29+00:00