| Step | Hyp | Ref
| Expression |
| 1 | | 2z 11409 |
. . . . . . 7
 |
| 2 | | 9nn 11192 |
. . . . . . . 8
 |
| 3 | 2 | nnzi 11401 |
. . . . . . 7
 |
| 4 | | 2re 11090 |
. . . . . . . 8
 |
| 5 | | 9re 11107 |
. . . . . . . 8
 |
| 6 | | 2lt9 11228 |
. . . . . . . 8
 |
| 7 | 4, 5, 6 | ltleii 10160 |
. . . . . . 7
 |
| 8 | | eluz2 11693 |
. . . . . . 7
         |
| 9 | 1, 3, 7, 8 | mpbir3an 1244 |
. . . . . 6
     |
| 10 | | fzouzsplit 12503 |
. . . . . . 7
    
      ..^        |
| 11 | 10 | eleq2d 2687 |
. . . . . 6
    
       ..^         |
| 12 | 9, 11 | ax-mp 5 |
. . . . 5
    
  ..^        |
| 13 | | elun 3753 |
. . . . 5
   ..^        ..^        |
| 14 | 12, 13 | bitri 264 |
. . . 4
       ..^        |
| 15 | | elfzo2 12473 |
. . . . . . . 8
  ..^     
   |
| 16 | | simp1 1061 |
. . . . . . . . 9
             |
| 17 | | df-9 11086 |
. . . . . . . . . . . 12
   |
| 18 | 17 | breq2i 4661 |
. . . . . . . . . . 11

    |
| 19 | | eluz2nn 11726 |
. . . . . . . . . . . . . . 15
    
  |
| 20 | | 8nn 11191 |
. . . . . . . . . . . . . . 15
 |
| 21 | 19, 20 | jctir 561 |
. . . . . . . . . . . . . 14
    
    |
| 22 | 21 | adantr 481 |
. . . . . . . . . . . . 13
       
   |
| 23 | | nnleltp1 11432 |
. . . . . . . . . . . . 13
 
       |
| 24 | 22, 23 | syl 17 |
. . . . . . . . . . . 12
       
     |
| 25 | 24 | biimprd 238 |
. . . . . . . . . . 11
       
     |
| 26 | 18, 25 | syl5bi 232 |
. . . . . . . . . 10
       
   |
| 27 | 26 | 3impia 1261 |
. . . . . . . . 9
         |
| 28 | 16, 27 | jca 554 |
. . . . . . . 8
               |
| 29 | 15, 28 | sylbi 207 |
. . . . . . 7
  ..^
    
   |
| 30 | | nnsum3primesle9 41682 |
. . . . . . 7
         
      

            |
| 31 | 29, 30 | syl 17 |
. . . . . 6
  ..^
  
      

            |
| 32 | 31 | a1d 25 |
. . . . 5
  ..^
 
Even 
GoldbachEven                         |
| 33 | | breq2 4657 |
. . . . . . . . . . 11
 
   |
| 34 | | eleq1 2689 |
. . . . . . . . . . 11
 
GoldbachEven
GoldbachEven   |
| 35 | 33, 34 | imbi12d 334 |
. . . . . . . . . 10
  
GoldbachEven
 GoldbachEven    |
| 36 | 35 | rspcv 3305 |
. . . . . . . . 9
 Even   Even 
GoldbachEven 
GoldbachEven    |
| 37 | | 4re 11097 |
. . . . . . . . . . . . . . 15
 |
| 38 | 37 | a1i 11 |
. . . . . . . . . . . . . 14
    
  |
| 39 | 5 | a1i 11 |
. . . . . . . . . . . . . 14
    
  |
| 40 | | eluzelre 11698 |
. . . . . . . . . . . . . 14
    
  |
| 41 | 38, 39, 40 | 3jca 1242 |
. . . . . . . . . . . . 13
    
    |
| 42 | 41 | adantl 482 |
. . . . . . . . . . . 12
  Even     
    |
| 43 | | eluzle 11700 |
. . . . . . . . . . . . . 14
    
  |
| 44 | 43 | adantl 482 |
. . . . . . . . . . . . 13
  Even     
  |
| 45 | | 4lt9 11226 |
. . . . . . . . . . . . 13
 |
| 46 | 44, 45 | jctil 560 |
. . . . . . . . . . . 12
  Even     
    |
| 47 | | ltletr 10129 |
. . . . . . . . . . . 12
 
  
    |
| 48 | 42, 46, 47 | sylc 65 |
. . . . . . . . . . 11
  Even     
  |
| 49 | | pm2.27 42 |
. . . . . . . . . . 11
  
GoldbachEven GoldbachEven   |
| 50 | 48, 49 | syl 17 |
. . . . . . . . . 10
  Even     
 
GoldbachEven
GoldbachEven   |
| 51 | 50 | ex 450 |
. . . . . . . . 9
 Even       
GoldbachEven GoldbachEven    |
| 52 | 36, 51 | syl5d 73 |
. . . . . . . 8
 Even        Even 
GoldbachEven GoldbachEven    |
| 53 | 52 | impcom 446 |
. . . . . . 7
      Even
 
Even 
GoldbachEven GoldbachEven   |
| 54 | | nnsum3primesgbe 41680 |
. . . . . . 7
 GoldbachEven                        |
| 55 | 53, 54 | syl6 35 |
. . . . . 6
      Even
 
Even 
GoldbachEven                         |
| 56 | | 3nn 11186 |
. . . . . . . . . 10
 |
| 57 | 56 | a1i 11 |
. . . . . . . . 9
      
Odd 
Odd 
GoldbachOddW 
  |
| 58 | | oveq2 6658 |
. . . . . . . . . . . 12
           |
| 59 | 58 | oveq2d 6666 |
. . . . . . . . . . 11
       
       |
| 60 | | breq1 4656 |
. . . . . . . . . . . 12
 
   |
| 61 | 58 | sumeq1d 14431 |
. . . . . . . . . . . . 13
           
           |
| 62 | 61 | eqeq2d 2632 |
. . . . . . . . . . . 12
           
             |
| 63 | 60, 62 | anbi12d 747 |
. . . . . . . . . . 11
  

          
              |
| 64 | 59, 63 | rexeqbidv 3153 |
. . . . . . . . . 10
  
       
          
 
      

             |
| 65 | 64 | adantl 482 |
. . . . . . . . 9
       
Odd  Odd  GoldbachOddW     
      

           
      

             |
| 66 | | 3re 11094 |
. . . . . . . . . . . 12
 |
| 67 | 66 | leidi 10562 |
. . . . . . . . . . 11
 |
| 68 | 67 | a1i 11 |
. . . . . . . . . 10
      
Odd 
Odd 
GoldbachOddW 
  |
| 69 | | 6nn 11189 |
. . . . . . . . . . . . . 14
 |
| 70 | 69 | nnzi 11401 |
. . . . . . . . . . . . 13
 |
| 71 | | 6re 11101 |
. . . . . . . . . . . . . 14
 |
| 72 | | 6lt9 11224 |
. . . . . . . . . . . . . 14
 |
| 73 | 71, 5, 72 | ltleii 10160 |
. . . . . . . . . . . . 13
 |
| 74 | | eluzuzle 11696 |
. . . . . . . . . . . . 13
       
       |
| 75 | 70, 73, 74 | mp2an 708 |
. . . . . . . . . . . 12
    
      |
| 76 | 75 | anim1i 592 |
. . . . . . . . . . 11
      Odd
    
Odd   |
| 77 | | nnsum4primesodd 41684 |
. . . . . . . . . . 11
 
Odd 
GoldbachOddW      
Odd  
                   |
| 78 | 76, 77 | mpan9 486 |
. . . . . . . . . 10
      
Odd 
Odd 
GoldbachOddW 
 
                  |
| 79 | | r19.42v 3092 |
. . . . . . . . . 10
                    
 
                    |
| 80 | 68, 78, 79 | sylanbrc 698 |
. . . . . . . . 9
      
Odd 
Odd 
GoldbachOddW 
 
      

            |
| 81 | 57, 65, 80 | rspcedvd 3317 |
. . . . . . . 8
      
Odd 
Odd 
GoldbachOddW 
  
      

            |
| 82 | 81 | expcom 451 |
. . . . . . 7
 
Odd 
GoldbachOddW      
Odd                         |
| 83 | | sbgoldbwt 41665 |
. . . . . . 7
 
Even 
GoldbachEven  Odd 
GoldbachOddW   |
| 84 | 82, 83 | syl11 33 |
. . . . . 6
      Odd
 
Even 
GoldbachEven                         |
| 85 | | eluzelz 11697 |
. . . . . . 7
    
  |
| 86 | | zeoALTV 41581 |
. . . . . . 7
  Even
Odd   |
| 87 | 85, 86 | syl 17 |
. . . . . 6
    
 Even Odd   |
| 88 | 55, 84, 87 | mpjaodan 827 |
. . . . 5
    
 
Even 
GoldbachEven                         |
| 89 | 32, 88 | jaoi 394 |
. . . 4
   ..^     
 
Even 
GoldbachEven                         |
| 90 | 14, 89 | sylbi 207 |
. . 3
    
 
Even 
GoldbachEven                         |
| 91 | 90 | impcom 446 |
. 2
   Even 
GoldbachEven     
  
      

            |
| 92 | 91 | ralrimiva 2966 |
1
 
Even 
GoldbachEven        
                     |