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Memo to me...

D:\openssl>openssl prime -hex 2f
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
2F is prime

D:\openssl>openssl prime -generate -bits 64
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
14714640941308689713

D:\openssl>openssl prime -generate -bits 64 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
C177247FA4858DF1

Found here:

OpenSSL Command-Line HOWTO

So IMHO for 1024 bit Primes... for my tiny RSA 2048 Project...

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
CE6F1F86D140DDE68A99F44EA84010FEE223EDA4DADFB0677C7DC2F2638ACE2DDCBBA122432F8B9A2A3CD8E15AAFABE4C06E1F71D77ED17E2B70F01C786006CC63828C516512385AFD038604CD0DFABD5205282743CF18BB98107A6D7462E0DCD50BE1E929FA195A040FEE56E17AB58CACF318AC200334819BE379CB84E06F9D

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
D07CC9B5326E040C5ADE053423E715CE4F63AAE7FECBF8F187CFA7A2776F4724F183C06D23836D4CF48CDD01256278B2C47E96A9D160896DC7D3D96E05778F809F86D135A62CD257CC99D3B60ED49E9C2D9D607CCE024887FB21C3797E53DB8ADCEC4A13E7EB8BA58AA015EEDE95363D6E589C1A8E17D68A34EF2332A68C43F7

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
E8C77F52CD27A378FCCC3AC79F19CDFB558AF3E6D11F09840A900018A6E208BC5B9343C2F298264E96779972141D23E1D673306689E06EC10F8156030B8394F4C1E3873BEE278B6FDFE1754994504E43BD95D37A1F22F28E57F19FD1FAFAC86CA18FEB18BAA87E9F36ECCBB6E76134DC4209E7A5ED25B09219D71FC6054D533F

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
D2EA8F64785B9ADC594DB061198B6EC12E6CB9BEB9FD794662AEF3E10F72CFFDC5E7699EE66BFE5179E6D4E5B0685378C100CC169B2BDCBFFF2E833D3C55076568B93F948064055A29E7D9DC4423B34377DFAA884C0628B4E93832117B924C3D5970236D191C400C6C2F7560388DF98ABDDFBC4762C241099438935601697DDD

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
FC46086450E114D675DE5A65D8658A0589CBA7DFE73672204F508FEB3FBA9B8F84154A1C3D3DD94282C17A3FFEC09EB27C7E517C57A30463B780E0506D4293A6259C45F47F17C6F43BCE35157E0BCB6539021C6CED90F6FAF2F1480E3F5470E2D46807DE00220CC8C25E3BEBF0922612A58E89373A852FD28B51B1A0B86C58B9

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
C7E3FB1A1E9BC33A982EEDCE3A9221E3600DA125ADBE696C04F673DCAFFB83691CCAF653ECD1766F5E582863D65AF819998C7365E476199DEE0BB7205BA00FE911A7E6BFB0DE90DE183EBED1D1F55B39283EE42EC6FEE326A5E988723C9BD53C5BE44FB311FB46746446C30096C8C40C79A83FD0037EC3722132B62D737E40CD

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
D608EAC3660334EE62E7D4A6FF6B3BD533F0077DD25E0719A08B82D4A2591BAE7B37B099292F3EC0BBC64B04EC1641855025FB8EB163E47AD3ACB231C44FC7172DB48363FF6AF50252A0CE904F45D8E086FE774633BD5C7A9BA6E8E3405E273133D7FBBD46AF3FD562BBA484E852DE73A0FF67D2FBDF5495CD6B25B06760B327

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
D102EB093A315DD0E0DEECF427B902484F352184D67429EE8205FDDD1399043A8BBAA3BFFBBEFD68C000B81B142F442A2B0FB0A5E3B3407D291F739C3D151CA51632A459E9B60C2E00C27EE7032C009ABF29DD81A8CCF11EBDD16274EDD7F24A7F046B47570D5ABB066DBDFB5F4D0848E4D502F9C14A7944F5C0D58A28FBD8C9

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
D09C4E81EB0E3ABBFDAD89DC4A83EBD839482472720B77A3CD880342C905F4EE632CFE793838683D8EAEA39C342A8A5D57594D0812C06B2F6DE5CF81928F8B9188AC31A740344B8EC007727232081940ABBF9FD55E56DC81829BB08F8E75BC5328FF8F331DC6731A05C3152143AEB68C742AFE7118A9D789B1857F32ED64732F

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
C056D69604C88F885B227AF7653372E683FB2828EFADF0E987BB8E507A0A8BCA45D3739C12352FB722C5FFEA50912F058C498030E536738D5C6F66B55215D6793BED30D90EDC8D08C8D601DE351C668AC4E5EE7FFD8EF6383EAC70406AAF33D10F5DD45CA3F6DBAF7347E03494AC557754802CFB09F7E056CF880CCDBB02DEC7

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
C88191695FC78C1349593360BF20A50942F24FB50828F8821365E3E65E5ACD2FBF4305B14A981B3732DCBE0090D4E7EA9E0878F0356369C74FBF540B79DDE847BD0AF15F9E3A4637DC243AB2C9312DE675E24EAE9638E1BEA4FE112F65EC1666B99611B270D3A7B342F8893AC0BD2DD60F0DDB490AAA2EC0688D61C3F76973BD

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
C6FB81E042199F8EABA6FBCEB2F97BE32F4CFD186CD7F7D17C9D678E2284E9759D630446742229A5D518F64B91ABD58AD16D4754D4262731BB99460701B2C6067023C9D51CFDD995E9C1B12F544C169EE4DB4E31D98EAA3C5344F229D7C47CAEFEAACCF83C3ED309735462434FABD06088EBB03478F23345981D42FB5A1AF59B

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
FF1106EF94AD800808F20B96728F7062AE53FD4D8D900610F414A9BBEF4F9BA9FCCAB96EEB24A2FFE6BD92FD51C8447FDEA05D8BAB1C6AD4EEF1CD83E33253F41B988F0740F3BF39CDDA27BE554163A079EE48D81F70BC26E97249DFC59D46811F990B3C603D44E1C3E0587D84C55997E59FB87F83E3D080B72EB150F661AFCD

D:\openssl>openssl prime -generate -bits 1024 -hex
WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf
E24BE8EAFF4C91DF1C140398768E7CC72154CF553B55D58B09CFBE0E54D33E5D266A0DCDDD690B5AEFEB96C15A877556E2C5921A873A7189E144FDABDF05CDDF79A4B5E70A51900EA8CB6221A4CC63E41379D2AEDD4D350406032C53D2E045BEEBE60C99B6E9FE34D7B0C2A366C05A67C414040FE4D61EDBC7313FADB715F339

Edit 1.

Aha... interesting...

What is OpenSSL CNF?

Found via Google search for:

WARNING: can't open config file: C:\Build-OpenSSL-VC-32/ssl/openssl.cnf