is 2 245261 - 1
has 73831 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual267121.152273.1343%30000000101202470268904,486.311423.3926%4,607.463679.4189%6.2846%
PrimeNet2400.000055.0000%2600650000.000013.9765%0.000061.2894%6.2894%
GPU722440.000059.0909%45001100000.000110.1303%0.000163.2351%4.1442%
Difference+23+121.1522+14.0434%+29995500+10120246916890+4,486.3113+13.2624%+4,607.4635+16.1838%+16.1838%

Known prime factors (3 factors, 159.7 bits, 0.06513064% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24526148561679825.53399
32 × 11
-9111.862e-117.411e-81.490e-7
24526176521433826.189156
22 × 3 × 13
2008-07-214133.768e-113.653e-86.623e-8
24526132845411110129401962772525935246333108.017669601182212610279717780771
3 × 312 × 3023 × 76830458015041151119
2022-02-203023768304580150411511197.677e+113.406e+106.361e+10

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
24526137160092659660071651.723
2452611595028310953137666578129354486605606537741133.551
2452612513377925621222653624366337594712083947941134.207
245261122053852029703690092834664664680040318098972524149159.740
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-07-28T15:24:13Oliver KruseOllaptop30000000300000000024-
skipped known factor: 48561679
skipped known factor: 76521433
--1.561--12.550%
2022-04-12T20:53:28Oliver KruseThreadripper-PC3000000010120247026890-
skipped known factor: 48561679
skipped known factor: 76521433
--4,486--23.393%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-21T09:14:00J FeitsmaManual testing??26.18981.23083e-120.0032.56003e-12


ECM factoring results:

Old Calculation Method

Total ECM effort:12.087 GHz-days
Estimated T-Level:27.289
DigitsB1CurvesCompleteFacMiss
2011000597 / 1005.9700.248%
2550000567 / 2802.02513.152%
30250000293 / 6400.45863.244%

New Calculation Method

Total ECM effort:12.087 GHz-days
Estimated T-Level:27.289
DigitsB1CompleteFacMiss
201100038.0660.000%
25500005.2150.543%
302500000.53158.819%
3510000000.04395.821%
4030000000.00399.719%


ECM Summary

B1B2factorcurvesGHz-days
110001100000300.039
5000050000002741.637
250000250000002407.170
2500002500000040.119
2500003300000070.231
2500003372092470.233
25000038392042140.493
25000038500000140.493
25000055133578571.671


Lucas-Lehmer results:
No L-L results for M245261


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T06:31:37Oliver KruseOllaptop
48561679
76521433
0BB93D257100E7__no
2017-09-22T10:05:51Oliver KruseManual testing
48561679
76521433
0BB93D257100E7__no
2017-10-12T17:28:39kkmrkkblmbrbkc4.xlarge0BB93D257100E7__no
2020-04-17T20:13:19Oliver KruseAddPrpType5
48561679
76521433
46260E5EA6C107__no
2022-02-20T05:53:52zr_zirconRyzen_5_3550H
48561679
76521433
328454111101294019627725259352463
46260E5EA6C107FAno


P-1 factor-bounds graph:
B1 = 30000000, B2 = 10120247026890 (P-1 stage 2)
B1 = 30000000, B2 = 3000000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
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TF factor-bounds graph:
267
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Last modified: 2022-07-03T18:27:21+00:00