is 2 2784689 - 1
has 838275 decimal digits
takes 0.215 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26710.670567.1642 %3300002612540701.62907.7921 %12.299569.7228 %
Target2630.573165.0794 %1500012000000.00891.7480 %0.582165.6898 %
Difference+4+10.0973+2.0848 %+315000+260054070+1.6201+6.0441%+11.7174+4.0330 %

Known prime factors (1 factor, 24.4 bits, 0.00087655% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
278468922277513824.4094
22
-448.033e-134.480e-79.117e-7

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-12-12USAFSSUSAFSACS330000261254070
skipped known factor: 22277513
--1.79511.037%


Trial Factoring results:
5758596061626364656667
No TF results for M2784689


ECM factoring results:
Total ECM effort:0.304 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.304


Lucas-Lehmer results:
No L-L results for M2784689


PRP results:
dateuseridcompidcofactorsres64
2017-10-21Oliver KruseGTX-2
22277513
B67B592A3711446E
2017-12-06kkmrkkblmbrbkc4.xlarge
22277513
B67B592A3711446E


CERT results:
No CERT results for M2784689


P-1 factor-bounds graph:
B1 = 330000, B2 = 261254070 (P-1 stage 2)
B1 = 330000 (P-1 stage 1)
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TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
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Last modified: 2024-03-13T02:15:48+00:00