is 2 433883 - 1
has 130612 decimal digits
takes 0.005 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L29709816DC99CF18double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26768.483771.6418 %100000004000000000.53379.6135 %69.017474.3680 %
Target2440.000056.8182 %800012000000.001213.5873 %0.001362.6854 %
Difference+23+68.4837+14.8236 %+9992000+398800000+0.5324-3.9738 %+69.0161+11.6826 %

Known prime factors (1 factor, 82.9 bits, 0.01909582% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
43388387377065046187596582792812582.85410069196655110663080
23 × 5 × 251729916377766577
2019-05-1482517299163777665773,391,053234,220,702437,459,046

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-06-23ANONYMOUSv4_computers32768327680012--0.00421.830%
2002-08-31ANONYMOUSv4_computers65536655360012--0.00724.471%
2003-04-03ANONYMOUSv4_computers1310721310720030--0.01427.060%
2009-08-26Carsten Kossendeymother433883433883--0.00716.758%
2010-08-15Rob_Deetwopc5000001000000--0.00919.695%
2010-08-16Rob_Deetwopc100000020000006--0.01821.872%
2012-08-29markrManual testing1000000040000000012--0.53439.079%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-03-18ANONYMOUSv4_computers212560.022
2002-02-03ANONYMOUSv4_computers212570.044
2004-01-07ANONYMOUSv4_computers212580.088
2016-02-23Mark RoseManual testing2582600.265
2012-11-27dbaughManual testing2602610.354
2012-12-01dbaughManual testing2612620.708
2015-11-29Gordon SpenceManual testing2622646.787
2017-12-21Gordon SpenceManual testing2642658.611
2018-12-12Gordon SpenceManual testing26526617.22


ECM factoring results:
Total ECM effort:18.565 GHz-days
Estimated T-Level:27.173
DigitsB1CompleteFacMiss
201100032.4970.000%
25500004.3631.274%
302500000.43564.756%
3510000000.03496.616%
4030000000.00299.775%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002803.307
25000025000000573.561
2500002500000018211.70


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-10ANONYMOUSv4_computers29709816DC99CF180.005


PRP results:
dateuseridcompidcofactorsres64
2019-05-15Niels_Mache_NextcloudSuperDry3
8737706504618759658279281
CE47169567ED7D00
2019-05-15francijezekstacF
8737706504618759658279281
CE47169567ED7D00
2019-05-15francijezekstacF
8737706504618759658279281
CE47169567ED7D00
2019-05-16kkmrkkblmbrbkc5.large
8737706504618759658279281
CE47169567ED7D00


CERT results:
No CERT results for M433883


P-1 factor-bounds graph:
B1 = 10000000, B2 = 400000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 1000000, B2 = 2000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 500000, B2 = 1000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 433883 (P-1 stage 1)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=27.17 ~= 74-bit
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Last modified: 2024-03-13T02:15:48+00:00