43x47

[Harry_the_cat]

2021 is the product of two consecutive primes. When was the last year that this happened and when will be the next?
Is there a special name given to such numbers?

 

[Steven G]

41*43=1763
47*53= 2491

 

[Romsek]

I'm not seeing any special name given to them.

 

[Otis]

… Is there a special name…

Hi Harriett, I couldn't find a name for products of two consecutive primes, but maybe you already know that products of any pair of prime factors are called semiprimes.

How about we name 'em, then? My first suggestion: domestic semiprimes.

I did learn something new, however, while searching: primorial numbers -- products of the first n primes (symbol n#). So, we could express 43×47 as 47#/41#.

?