is 2 1773649 - 1
has 533922 decimal digits
takes 0.096 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LCAEC670374B7748Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.753068.6567 %500000150000000.10155.0495 %16.854570.2394 %
Target2610.173265.5738 %80006000000.00321.4550 %0.176466.0747 %
Difference+6+16.5798+3.0829 %+492000+14400000+0.0983+3.5945%+16.6781+4.1647 %

Known prime factors (3 factors, 243.8 bits, 0.01374400% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
177364947803261024292444411962.0521347596424780
22 × 3 × 5 × 19 × 1182102127
2008-08-131911821021270.80645.06629.4622
1773649532067843241794017615597932685.46014999242895347219704
23 × 32 × 13 × 453737 × 35317446347
2020-09-11453737353174463478,801,298151.40282.70
1773649947922517012586669150649618732996.25926722381852682990522664
23 × 3 × 7 × 112 × 1314560303654220313
2023-05-0812113145603036542203131.086e+105.634e+91.052e+10

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012---8.835%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.022


ECM factoring results:
Total ECM effort:38.519 GHz-days
Estimated T-Level:25.715
DigitsB1CompleteFacMiss
201100014.5380.000%
25500001.66418.942%
302500000.14386.682%
3510000000.01099.008%


ECM Summary

B1B2factorcurvesGHz-days
10.155
50000500000017512.05
500005000000735.025
2500004000000041.704
250000400000004619.59


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06ANONYMOUSv4_computersCAEC670374B7748D0.096


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-2
4780326102429244441
C285CE6359FA84BC
2017-11-04kkmrkkblmbrbkc4.xlarge
4780326102429244441
C285CE6359FA84BC
2020-09-11ATHec2-PRPCF
4780326102429244441
53206784324179401761559793
2044DFD732CE6994
2023-05-08Naegi Makoto5950X
4780326102429244441
53206784324179401761559793
94792251701258666915064961873
2044DFD732CE6994


CERT results:
dateuseridcompid
2020-09-11Ben Deloi-02d0ce4c73e687afe
2023-05-08curtiscwcm210--02l


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00