;Definitions:
As used here, all unprimeable numbers (positive integers) are always expressed in base ten.
───── Definition from OEIS ─────:
Unprimeable numbers are composite numbers that always remain composite when a single decimal digit of the number is changed.
───── Definition from Wiktionary (referenced from Adam Spencer's book) ─────:
(''arithmetic'') that cannot be turned into a prime number by changing just one of its digits to any other
digit. (sic)
'''Unprimeable''' numbers are also spelled: '''unprimable'''.
All one─ and two─digit numbers can be turned into primes by changing a single decimal digit.
;Examples:
'''190''' isn't unprimeable, because by changing the zero digit into a three yields '''193''', which is a prime.
The number '''200''' is unprimeable, since none of the numbers '''201, 202, 203, ··· 209''' are
prime, and all the other numbers obtained by changing a single digit to
produce '''100, 300, 400, ··· 900''', or '''210, 220, 230, ··· 290''' which are all even.
It is valid to change '''189''' into '''089''' by changing the '''1''' (one) into
a '''0''' (zero), which then the leading zero can be removed, and then treated as if
the "new" number is '''89'''.
;Task:
::* show the first '''35''' unprimeable numbers (horizontally, on one line, preferably with a title)
::* show the '''600th''' unprimeable number
::* (optional) show the lowest unprimeable number ending in a specific decimal digit ('''0, 1, 2, 3, 4, 5, 6, 7, 8, 9''')
::* (optional) use commas in the numbers where appropriate
Show all output here, on this page.
;Also see:
:* the OEIS entry: [https://oeis.org/A118118 A118118 (unprimeable)]
:* with some useful counts to compare [http://www.numbersaplenty.com/set/unprimeable_number/ unprimeable number]
:* the Wiktionary entry (reference from below): [https://en.wiktionary.org/wiki/unprimeable (arithmetic definition) unprimeable]
:* from the Adam Spencer book (page 200): ''Adam Spencer's World of Numbers'' (Xoum Publishing)