70.75
56.6
0.0071
0.0106
You didn't mention whether we're allowed to repeat (re-use) a digit.Here are the smallest 5 primes using only those digits:With repeated digit: 223, 233, 277With no repeated digit: 257, 283
1, 283 (283 is a prime number).
7.075
56.6
0.0177
257.2727
0.0071
70.75
0.0777
283 Divided by 70 = 4.04 (hours)
0.0106
79.3333
56.6
Hey mate what is your 7 digit casting number??????????????