[seqfan] Re: (no subject)

[israel at math.ubc.ca]

Naively one might expect: for any b > 0 there should be infinitely many a 
making it prime, and for any a > 0 there should be infinitely many b making 
it prime. But of course none of this is likely to be provable with current 
technology.

Cheers,
Robert

On Dec 6 2017, Hugo Pfoertner wrote:

>In the range 1<=a,b<=500 there are 2111 primes of this form. Large
>examples: 1+(2^498)*(3^493) or 1+(2^994)*(3^993). Why should there be a
>limit?
>
>Hugo Pfoertner
>
>On Wed, Dec 6, 2017 at 6:51 PM, Frank Adams-Watters via SeqFan <
>seqfan at list.seqfan.eu> wrote:
>
>> Is https://oeis.org/A058383 (Primes of form 1+(2^a)*(3^b)) infinite?
>>
>> Franklin T. Adams-Watters
>>
>>
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