is 2 5024519 - 1
has 1512531 decimal digits
takes 0.696 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE897421DD93FFF08double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273380.702068.4932 %4000000898997022099.202810.2979 %479.904871.7377 %
Target2651.452064.6154 %3400035000000.04482.4180 %1.496865.4710 %
Difference+8+379.2500+3.8778 %+3966000+8986470220+99.1580+7.8798%+478.4080+6.2667 %

Known prime factors (1 factor, 82.9 bits, 0.00164993% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
502451990287886285105133210206732582.901898472931290588544
27 × 3 × 11 × 389 × 773 × 707378723
2022-05-17773707378723261,7737.746114.467

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2006-01-15Jossv4_computers20002000--0.0000.050%
2009-07-18USAFSSP4_2600550009075006--0.0202.851%
2014-11-14JossManual testing6777467774--0.0141.148%
2017-02-14Squeeky_Squirreli5-5250U_1600300000937500012--0.1606.006%
2021-04-04Dylan Delgadodesktoplinux56000031360000--0.4507.883%
2022-05-17Sid & AndyMagic_8_Ball4000000898997022022582.901126.817.541%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-10-19ATH5960X25000009000000027--1.703


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-06-01ANONYMOUSv4_computers212610.031
2016-02-23Mark RoseManual testing2612630.293
2014-08-30krackerManual testing2632640.391
2014-09-14lycornManual testing2642650.744
2015-07-27snme2pm1Manual testing2652661.487
2016-05-15Gordon SpenceManual testing2662672.975
2018-06-07ramgeisManual testing2672685.949
2021-02-01TJAOIManual testing26826911.90
2021-04-01ANONYMOUSManual testing26927171.39
2021-04-03ANONYMOUSManual testing27127295.18
2021-04-04ANONYMOUSManual testing272273190.4


ECM factoring results:
Total ECM effort:1.660 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.660


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-05ANONYMOUSv4_computersE897421DD93FFF080.696
2000-04-27Charlie Dorianv4_computersE897421DD93FFF080.696


PRP results:
dateuseridcompidcofactorsres64
2022-05-26XZT800G2Mini1
9028788628510513321020673
4A04708C4A9D0572


CERT results:
dateuseridcompid
2022-05-26Richard Thomasdjinn.pc


P-1 factor-bounds graph:
B1 = 4000000, B2 = 8989970220 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 560000, B2 = 31360000 (P-1 stage 2)
B1 = 300000, B2 = 9375000 (P-1 stage 2)
B1 = 560000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 55000, B2 = 907500 (P-1 stage 2)
B1 = 67774 (P-1 stage 1)
B1 = 55000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
273
272
271
269
268
267
266
265
264
263
261
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=1.73 ~= -11-bit
250
260
270
280
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00