Dimensions
42 x 6 x 7
42 x 42
Notice the conversion to other numbers of significance: 138; 19; and 23
137 and 139 are twin primes; and 137 is the Cosmic Number; so 138 is nestled in a Prime real estate neighborhood
19 is the number that "protects them" - also a twin prime with 17
And 23, which is not a twin prime but is a prime number.