text: multipy 3digit number with 2digit no.each digit is prime number,result has prime numbers,each step has primeno   you can not multiply two prime numbers together and expect to get a prime number. in fact you can not multiply any 2 number of numbers together and expect to get a prime due to the definition of a prime. a prime is a number that can be divided only by one and itself. as a result of multiplying two or more numbers together you introduce factors by definition.  now 121 times 13 = 1573 which is a case where each digit is a prime.