October 31

2  5 = .5
3  49 = 7^2
4  820 = 2^2.5 .41
5  21076 = 2^2.11 .479
6  773136 = 2^4.3^2.7.13 .59
7  38402064 = 2^4.3^2 .266681
8  2483133696 = 2^8.3^2.17 .63397
9  202759531776 = 2^8.3^4.19 .514639
10  20407635072000 = 2^10.3^4.5^3.11 .178939
11  2482492033152000 = 2^10.3^4.5^3.23.43 .242101
12  359072203696128000 = 2^14.3^6.5^3.13 .18500393
13  60912644957448192000 = 2^14.3^6.5^3 . mbox{BIG}
14  11977654199703478272000 = 2^16.3^6.5^3.7^2.29.7417 .190297
15  2702572249389834608640000 = 2^16.3^8.5^4.7^2.31.37.97 .1844659
16  693568508096521859235840000 = 2^22.3^8.5^4.7^2.17.619 .78206663
17  200879061976592212371701760000 = 2^22.3^8.5^4.7^2.601.643 .616798327
18  65211329626921423978616586240000 = 2^24.3^12.5^4.7^2.19.37.8821 .38512247
19  23582280384386431339420597616640000 = 2^24.3^12.5^4.7^2 . mbox{BIG}
20  9447709684208047354981782650880000000 = 2^28.3^12.5^7.7^2.41 . mbox{BIG}
21  4172358982917138811232383590727680000000 = 2^28.3^14.5^7.7^6.37.43.2621 .84786899
22  2022032032103888142745742749697310720000000 = 2^30.3^14.5^7.7^6.11^2.23.295831 .52030193
23  1070918322619001419237384155013872353280000000 = 2^30.3^14.5^7.7^6.11^2.47.127 . mbox{BIG}
24  617517280598012406503198094472283821178880000000 = 2^36.3^16.5^7.7^6.11^2.59.2237 . mbox{BIG}
25  386333256592971085341438546047330355354009600000000 = 2^36.3^16.5^8.7^6.11^2.157.3119 . mbox{BIG}
26  261401879093856785738899792754340924667566489600000000 = 2^38.3^16.5^8.7^7.11^2.13^2.53.70853.106357 .8408339
27  190724613862039229268164987801324162689677026918400000000 = 2^38.3^20.5^8.7^6.11^2.13^2.307.110023 . mbox{BIG}
jagy@phobeusjunior