is 2 9491897 - 1
has 2857346 decimal digits
takes 2.623 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L464816EE8C019669double-checked
PRPC74D6E5DD5BB9BADPRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272100.752666.6667%20000004660145490102.510810.2002%203.263570.0667%3.4001%
PrimeNet2640.375062.5000%4000011000000.03923.5001%0.414263.8126%1.3126%
GPU722686.279664.7059%6000014000000.05332.4636%6.332965.5754%0.8695%
Difference+4+94.4731+1.9608%+1940000+4658745490+102.4575+7.7366%+196.9306+4.4913%+2.5306%

Known prime factors (1 factor, 145.7 bits, 0.00153525% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
94918977371009326204063605719690048133557730204521744145.7253882790408600126826976572779989899664
24 × 32 × 113 × 15307 × 455053 × 701699 × 1071223 × 3869194753
2022-06-19107122338691947531.971e+1084.889157.79

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-08-25T00:00:00Brian Jongekrygv4_computers50000837500---0.037--1.229%
2013-01-08T18:17:00NesowaOutback1150002156250---0.091--1.929%
2022-06-19T23:49:12ThaZ-1702000000466014549044145.725102.55.247205.010.200%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-02-21T00:00:00ANONYMOUSv4_computers21255--0.001--
1999-12-30T00:00:00ANONYMOUSv4_computers21257--0.002--
2000-01-04T00:00:00ANONYMOUSv4_computers21264--0.375--
2013-09-04T08:11:00NesowaManual testing264265--0.394--
2015-05-08T13:50:00VictordeHollanderManual testing265266--0.787--
2016-06-21T01:21:44snme2pm1Manual testing266267--1.575--
2016-06-21T01:21:44snme2pm1Manual testing267268--3.149--
2019-09-16T14:37:54mnd9Manual testing268269--6.298--
2021-08-19T12:32:47TJAOIManual testing269270--12.60--
2021-08-21T05:00:31SRBaseManual testing269270--12.60--
2021-08-29T06:36:49SRBaseManual testing270271--25.19--
2021-10-19T15:47:43SRBaseManual testing271272--50.39--


ECM factoring results:
Total ECM effort:1.261 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000031.261


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-04-19T00:00:00Spectrev4_computers464816EE8C0196692.623
2003-09-09T00:00:00Brian Jongekrygv4_computers464816EE8C0196692.623


PRP results:
dateuseridcompidcofactorsres64PRP
2022-06-27T01:46:44firejugglerMaison
73710093262040636057196900481335577302045217
C74D6E5DD5BB9BADno


P-1 factor-bounds graph:
B1 = 2000000, B2 = 4660145490 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 115000, B2 = 2156250 (P-1 stage 2)
B1 = 115000 (P-1 stage 1)
B1 = 50000, B2 = 837500 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
103
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1010
TF factor-bounds graph:
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270
269
268
267
266
265
264
257
255
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260
270
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2100
2110
2120
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Last modified: 2022-06-27T01:46:44+00:00