This value gives rise to the primes ⌊ d 1 ⌋ = 2 {\displaystyle \left\lfloor d_{1}\right\rfloor =2} , ⌊ d 2 ⌋ = 11 {\displaystyle \left\lfloor d_{2}\right\rfloor =11} , ⌊ d 3 ⌋ = 1361 {\displaystyle \left\lfloor d_{3}\right\rfloor =1361} , ... (sequence A051254 in the OEIS). Very little is known about the constant A (not even whether it is rational). This formula has no practical value, because there is no known way of calculating the constant without finding primes in the first place.