is 2 1786963 - 1
has 537930 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
Actual26716.628268.6567%500000150000000.10155.0541%16.729670.2408%1.5841%
PrimeNet2570.010763.1579%80001400000.00122.8136%0.011964.1945%1.0366%
GPU722610.171965.5738%80001300000.00121.4929%0.173166.0877%0.5139%
Difference+6+16.4563+3.0829%+492000+14870000+0.1003+3.5612%+16.5566+4.1531%+4.1531%

Known prime factors (4 factors, 250.8 bits, 0.01403488% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1786963458463227291135.41612828
22 × 3 × 1069
-410694.551e-94.879e-68.523e-6
178696329774417256670281671961.369833101112241
32 × 92566790249
2016-04-229925667902490.1838396.72740.96
178696394024569653853594630472272.9942630848250743121
5023 × 523760352527
2020-06-145023523760352527546.872,244.74,192.5
178696324510397651494448464217612581.020685811559934213760
27 × 5 × 31 × 258031 × 133964969
2020-11-06258031133964969317,9560.59331.0723

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
17869631365047542617212561386153077433096.785
178696343106807648059117179452691169526333108.410
178696311237116009465381534423789565450576936116.436
17869632799526769252695360431711220734734464484941134.362
1786963729782806802507050811411282635402874874208743142.388
17869632304579591226589332992647709174259619825616576747154.013
178696312834800775163378564747320939153519275889371414729
21
52169.778
178696333457858082743194817797962979654513842417377338699
5423
54177.805
178696310565649969404111152632977425900564063015806427680
03818143
58189.429
178696368617514350387105099337095719689443139786834971126
406923010159089
65215.382
178696331458607077696360064642500943264467298409622963517
24648446503609739926633881
76250.798
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:34:01alpertronManual testing5000001500000012-
skipped known factor: 45846322729
--0.101--5.054%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-04-22T15:06:23TJAOIManual testing261262*61.369190.0120.1970.024


ECM factoring results:

Old Calculation Method

Total ECM effort:17.291 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.291 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020414.05
500005000000322.204
500005000000151.033


Lucas-Lehmer results:
No L-L results for M1786963


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:35:05alpertronManual testing
45846322729
2977441725667028167
6E04CCC667A1D4__no
2017-10-19T17:50:02Oliver KruseThreadripper
45846322729
2977441725667028167
6E04CCC667A1D4__no
2020-06-15T15:36:29riccardo ubertiNomad2C
45846322729
2977441725667028167
9402456965385359463047
1BEC7FFEA760E5F0no
2020-06-16T18:40:09Luigi Morelli9800X
45846322729
2977441725667028167
9402456965385359463047
1BEC7FFEA760E5F0no
2020-11-06T14:07:37Oliver KruseIOS-5
45846322729
2977441725667028167
9402456965385359463047
2451039765149444846421761
1BEC7FFEA760E5F0no


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
262
230
240
250
260
270
280
290
2100
Last modified: 2020-11-13T10:48:49+00:00