Depends which way you're counting. If you're counting up, it's 53. If down, it's 43.
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47
First of all, 45 is not a prime number. The smallest prime bigger than 45 is 47.
The first prime number after 47 is 53.
primeprime47 is prime. It is only evenly divisible by itself and one.A primeprime
1 x 47 and 47 x 1 (47 is a prime number).