is 2 490313 - 1
has 147599 decimal digits
takes 0.006 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ECM on 2024-03-15, 0.0% done, ETC 2024-03-15
0 primality tests remaining
ResidueStatus
L-LCF0E93EEAE4D3B3Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual268121.565072.0588 %6800000010909997198101,016.212621.2456 %1,137.777677.9951 %
Target2440.000056.8182 %900014000000.001414.3216 %0.001563.0025 %
Difference+24+121.5649+15.2406 %+67991000+1090998319810+1,016.2112+6.9240%+1,137.7761+14.9926 %

Known prime factors:
No known factors for M490313

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-06-23ANONYMOUSv4_computers32768327680012--0.00422.079%
2002-09-22ANONYMOUSv4_computers65536655360012--0.00724.724%
2003-04-27ANONYMOUSv4_computers1310721310720030--0.01427.316%
2010-12-03Rob_Deetwopc5000001000000--0.00919.905%
2010-12-04Rob_Deetwopc100000020000006--0.01822.086%
2012-06-16alpertronManual testing1000000020000000012--0.34837.139%
2016-12-02JossManual testing2000000002000000000012--21.8450.380%
2023-07-11JossJoss100000049167698580--59.0449.419%
2023-07-13JossJoss1000000107012235330--128.550.978%
2023-07-14JossJoss1000000222701308830--267.352.397%
2023-07-15JossJoss1000000454079455830--545.153.731%
2023-10-17masserManual testing680000001090999719810--1,01660.690%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-12-12masserManual testing40000009600000010141--0.188
2022-12-15masserManual testing1600000049600000027--0.853
2022-12-19masserManual testing800000021600000065--0.397


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-05-05ANONYMOUSv4_computers212540.005
2022-03-07LordJuliusManual testing254255
2001-03-25ANONYMOUSv4_computers212560.020
2002-01-22ANONYMOUSv4_computers212570.039
2003-12-23ANONYMOUSv4_computers212580.078
2016-02-23Mark RoseManual testing2582600.235
2011-06-23Sid & AndyBuzz2602610.313
2015-06-04snme2pm1Manual testing2612620.626
2015-11-04Gordon SpenceManual testing2622646.006
2018-01-09BloodERazorManual testing2642657.620
2018-01-11Gordon SpenceManual testing264265
2018-07-30BloodERazorManual testing26526615.24
2020-12-09chuenkitManual testing26626730.48
2022-05-20Gordon SpenceManual testing26726860.96


ECM factoring results:
Total ECM effort:32.170 GHz-days
Estimated T-Level:28.767
DigitsB1CompleteFacMiss
201100051.1330.000%
25500007.2500.071%
302500000.75347.078%
3510000000.06194.042%
4030000000.00499.592%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002803.427
2500002500000044428.74


Lucas-Lehmer results:
No L-L results for M490313


PRP results:
No PRP results for M490313


CERT results:
No CERT results for M490313


P-1 factor-bounds graph:
B1 = 68000000, B2 = 1090999719810 (P-1 stage 2)
B1 = 1000000, B2 = 454079455830 (P-1 stage 2)
B1 = 1000000, B2 = 222701308830 (P-1 stage 2)
B1 = 1000000, B2 = 107012235330 (P-1 stage 2)
B1 = 1000000, B2 = 49167698580 (P-1 stage 2)
B1 = 200000000, B2 = 20000000000 (P-1 stage 2)
B1 = 200000000 (P-1 stage 1)
B1 = 68000000 (P-1 stage 1)
B1 = 10000000, B2 = 200000000 (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 = 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=28.77 ~= 79-bit
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Last modified: 2024-03-29T11:40:05+00:00