Prime numbers p for which the sum of primes less than or equal to p is prime: Difference between revisions

m
no need for dict
m (no need for dict)
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<lang julia>using Primes
 
primesumto(N) = begin s = 0; Dict([i => s for i in 1:N if isprime(i) && isprime(s += i))] end
 
const primesumdict = primesumto(1000)
 
println("Prime Prime Sum to Prime\n---------------------------")
for kp in primesumdict |> keys |> collect |> sort
println(rpad(kp[1], 7), primesumdictp[k2])
end
println("\nTotal such primes < 100: ", length(primesumdict))
4,103

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