I think this is a little prettier:
(1) -> _<_< (x,y) == hconcat(x,y)$OutputForm
Type: Void
(2) -> for n in 10..30 repeat output(n << " = "::Symbol << factor(2^n-1))
Here, once the concept of << is understood, the only obscure notation
is probably
" = "::Symbol
which is just a way to avoid printing the quotation marks " around the string.
Have you tried
(6) -> for n in 10..13 repeat output(n << = << factor(2^n-1))
10=3 11 31
11=23 89
2
12=3 5 7 13
13=8191
Well... the spaces around = are missing... one cannot have everything.
Ralf
PS: I still don't like it. There are hidden coercions to OuputForm.
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