Will the next number be R509?

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DSJR9453
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Will the next number be R509?

#1 Ungelesener Beitrag von DSJR9453 » 24.04.2023 23:12

Recently yoyo@home found two prime factors of R503 and one prime factor of R505, searched to ECM effort 60 digits and B1 = 85e7, will you also search to the same limit for R509, which has no single known prime factor?

kurtb
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Re: Will the next number be R509?

#2 Ungelesener Beitrag von kurtb » 26.04.2023 05:26

R509 is checked with B1=260e6 and 45000 curves.
Factors up to about 60 digits should be covered.
For B1=850e6 is the number too big!
More curves with B1=260e6 are not useful and would be a waste of time!
Kurt

DSJR9453
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Re: Will the next number be R509?

#3 Ungelesener Beitrag von DSJR9453 » 27.04.2023 14:20

But both R503 and R505 (and also R507) are checked with B1=850e6 (I have seen your page https://kurtbeschorner.de/ecm-efforts.htm)

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