Concatenate two primes is also prime: Difference between revisions

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used subscripts in task preamble.
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;Task:
Find and show here when the concatenation of two primes &nbsp; ('''p1p<sub>1</sub>''', &nbsp;'''p2p<sub>2</sub>''') &nbsp; shown in base ten is also prime, &nbsp; where &nbsp; '''p<sub>1</sub>, &nbsp; p<sub>2</sub> &nbsp;&lt;&nbsp; 100'''
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