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Topic: Two flavors of Prime Numbers involved in their running sums
Replies: 4   Last Post: Jan 24, 2011 6:13 AM

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Henry

Posts: 1,089
Registered: 12/6/04
Re: Two flavors of Prime Numbers involved in their running sums
Posted: Jan 24, 2011 6:13 AM
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On Jan 21, 2:10 pm, rom...@sbcglobal.net wrote:
> Ok Henry
> but counting a sequence is very straight forward.
>
> I made sure my work was in harmony with the published data.
>
> The series shows the following in the same run, making your claims
> rather
> lame.
>
> mark 1e6  at step:78497 PN : 999979  Sum: 3.754940E+10 Lp: 50.599179
>
> mark 1e9  at step:50847533 PN : 999999929  Sum: 2.473951E+16 Lp: 78.441917
>
> mark 1e10  at step:455052510 PN : 9999999943  Sum: 2.220822E+18 Lp: 87.787554
>
> at step 1000000000,  PN is 22801763489 sum Lp 91.138528
>


I think you will find most sources say there are 78498 primes smaller
than 1 million, and that the largest of them is 999983, so their sum
is 37550402023. Your other two also look as if they are out by one
prime:
http://oeis.org/A006880
http://oeis.org/A003618



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