Origins On NUMBER@1 June , NUMBER@2 , the MISC@1 mathematician PERSON@1 wrote a letter to PERSON@2 -LRB- letter XLIII -RRB- -LSB- -RSB- in which he proposed the following conjecture : Every integer greater than NUMBER@3 can be written as the sum of three primes .

Origins On NUMBER@1 June , NUMBER@2 , the MISC@1 mathematician PERSON@1 wrote a letter to PERSON@2 -LRB- letter XLIII -RRB- -LSB- -RSB- in which he proposed the following conjecture : Every integer greater than NUMBER@3 can be written as the sum of three primes .
