The calculator I always wanted
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09-17-2019, 08:25 AM
(This post was last modified: 09-17-2019 08:26 AM by EdS2.)
Post: #10
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RE: The calculator I always wanted
(09-16-2019 08:33 PM)vanLudwig Wrote: I wondered for which integers n is the sum of the first n primes itself prime? 2 is prime. 2+3=5 is prime. 2+3+5=10 is not. 2+3+5+7=17 is prime. 2+3+5+7+11=28 is not. Some resources at the OEIS: https://oeis.org/A013916 |
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