Sum of reciprocals of twin primes. Brun (1919) proved the sum converges — strong evidence that twin primes are much sparser than primes. Numerical value is known only to limited precision; the digits depend on the twin-prime-counting…
Sum of reciprocals of twin primes. Brun (1919) proved the sum converges — strong evidence that twin primes are much sparser than primes. Numerical value is known only to limited precision; the digits depend on the twin-prime-counting…