Theorem 2lgsoddprmlem3 15790

Description: Lemma 3 for 2lgsoddprm . (Contributed by AV, 20-Jul-2021.)

Assertion

Ref	Expression
2lgsoddprmlem3	|- ( ( N e. ZZ /\ -. 2 || N /\ R = ( N mod 8 ) ) -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> R e. { 1 , 7 } ) )

Proof of Theorem 2lgsoddprmlem3

Step	Hyp	Ref	Expression
1		lgsdir2lem3 15709	. . 3 |- ( ( N e. ZZ /\ -. 2 || N ) -> ( N mod 8 ) e. ( { 1 , 7 } u. { 3 , 5 } ) )
2		eleq1 2292	. . . . 5 |- ( ( N mod 8 ) = R -> ( ( N mod 8 ) e. ( { 1 , 7 } u. { 3 , 5 } ) <-> R e. ( { 1 , 7 } u. { 3 , 5 } ) ) )
3	2	eqcoms 2232	. . . 4 |- ( R = ( N mod 8 ) -> ( ( N mod 8 ) e. ( { 1 , 7 } u. { 3 , 5 } ) <-> R e. ( { 1 , 7 } u. { 3 , 5 } ) ) )
4		elun 3345	. . . . . 6 |- ( R e. ( { 1 , 7 } u. { 3 , 5 } ) <-> ( R e. { 1 , 7 } \/ R e. { 3 , 5 } ) )
5		elpri 3689	. . . . . . . 8 |- ( R e. { 3 , 5 } -> ( R = 3 \/ R = 5 ) )
6		oveq1 6008	. . . . . . . . . . . . . 14 |- ( R = 3 -> ( R ^ 2 ) = ( 3 ^ 2 ) )
7	6	oveq1d 6016	. . . . . . . . . . . . 13 |- ( R = 3 -> ( ( R ^ 2 ) - 1 ) = ( ( 3 ^ 2 ) - 1 ) )
8	7	oveq1d 6016	. . . . . . . . . . . 12 |- ( R = 3 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( ( ( 3 ^ 2 ) - 1 ) / 8 ) )
9		2lgsoddprmlem3b 15787	. . . . . . . . . . . 12 |- ( ( ( 3 ^ 2 ) - 1 ) / 8 ) = 1
10	8, 9	eqtrdi 2278	. . . . . . . . . . 11 |- ( R = 3 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = 1 )
11	10	breq2d 4095	. . . . . . . . . 10 |- ( R = 3 -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> 2 || 1 ) )
12		n2dvds1 12423	. . . . . . . . . . 11 |- -. 2 || 1
13	12	pm2.21i 649	. . . . . . . . . 10 |- ( 2 || 1 -> R e. { 1 , 7 } )
14	11, 13	biimtrdi 163	. . . . . . . . 9 |- ( R = 3 -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) -> R e. { 1 , 7 } ) )
15		oveq1 6008	. . . . . . . . . . . . . 14 |- ( R = 5 -> ( R ^ 2 ) = ( 5 ^ 2 ) )
16	15	oveq1d 6016	. . . . . . . . . . . . 13 |- ( R = 5 -> ( ( R ^ 2 ) - 1 ) = ( ( 5 ^ 2 ) - 1 ) )
17	16	oveq1d 6016	. . . . . . . . . . . 12 |- ( R = 5 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( ( ( 5 ^ 2 ) - 1 ) / 8 ) )
18	17	breq2d 4095	. . . . . . . . . . 11 |- ( R = 5 -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> 2 || ( ( ( 5 ^ 2 ) - 1 ) / 8 ) ) )
19		2lgsoddprmlem3c 15788	. . . . . . . . . . . 12 |- ( ( ( 5 ^ 2 ) - 1 ) / 8 ) = 3
20	19	breq2i 4091	. . . . . . . . . . 11 |- ( 2 || ( ( ( 5 ^ 2 ) - 1 ) / 8 ) <-> 2 || 3 )
21	18, 20	bitrdi 196	. . . . . . . . . 10 |- ( R = 5 -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> 2 || 3 ) )
22		n2dvds3 12426	. . . . . . . . . . 11 |- -. 2 || 3
23	22	pm2.21i 649	. . . . . . . . . 10 |- ( 2 || 3 -> R e. { 1 , 7 } )
24	21, 23	biimtrdi 163	. . . . . . . . 9 |- ( R = 5 -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) -> R e. { 1 , 7 } ) )
25	14, 24	jaoi 721	. . . . . . . 8 |- ( ( R = 3 \/ R = 5 ) -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) -> R e. { 1 , 7 } ) )
26	5, 25	syl 14	. . . . . . 7 |- ( R e. { 3 , 5 } -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) -> R e. { 1 , 7 } ) )
27	26	jao1i 801	. . . . . 6 |- ( ( R e. { 1 , 7 } \/ R e. { 3 , 5 } ) -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) -> R e. { 1 , 7 } ) )
28	4, 27	sylbi 121	. . . . 5 |- ( R e. ( { 1 , 7 } u. { 3 , 5 } ) -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) -> R e. { 1 , 7 } ) )
29		elpri 3689	. . . . . 6 |- ( R e. { 1 , 7 } -> ( R = 1 \/ R = 7 ) )
30		z0even 12422	. . . . . . . 8 |- 2 || 0
31		oveq1 6008	. . . . . . . . . . 11 |- ( R = 1 -> ( R ^ 2 ) = ( 1 ^ 2 ) )
32	31	oveq1d 6016	. . . . . . . . . 10 |- ( R = 1 -> ( ( R ^ 2 ) - 1 ) = ( ( 1 ^ 2 ) - 1 ) )
33	32	oveq1d 6016	. . . . . . . . 9 |- ( R = 1 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( ( ( 1 ^ 2 ) - 1 ) / 8 ) )
34		2lgsoddprmlem3a 15786	. . . . . . . . 9 |- ( ( ( 1 ^ 2 ) - 1 ) / 8 ) = 0
35	33, 34	eqtrdi 2278	. . . . . . . 8 |- ( R = 1 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = 0 )
36	30, 35	breqtrrid 4121	. . . . . . 7 |- ( R = 1 -> 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) )
37		2z 9474	. . . . . . . . 9 |- 2 e. ZZ
38		3z 9475	. . . . . . . . 9 |- 3 e. ZZ
39		dvdsmul1 12324	. . . . . . . . 9 |- ( ( 2 e. ZZ /\ 3 e. ZZ ) -> 2 || ( 2 x. 3 ) )
40	37, 38, 39	mp2an 426	. . . . . . . 8 |- 2 || ( 2 x. 3 )
41		oveq1 6008	. . . . . . . . . . 11 |- ( R = 7 -> ( R ^ 2 ) = ( 7 ^ 2 ) )
42	41	oveq1d 6016	. . . . . . . . . 10 |- ( R = 7 -> ( ( R ^ 2 ) - 1 ) = ( ( 7 ^ 2 ) - 1 ) )
43	42	oveq1d 6016	. . . . . . . . 9 |- ( R = 7 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( ( ( 7 ^ 2 ) - 1 ) / 8 ) )
44		2lgsoddprmlem3d 15789	. . . . . . . . 9 |- ( ( ( 7 ^ 2 ) - 1 ) / 8 ) = ( 2 x. 3 )
45	43, 44	eqtrdi 2278	. . . . . . . 8 |- ( R = 7 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( 2 x. 3 ) )
46	40, 45	breqtrrid 4121	. . . . . . 7 |- ( R = 7 -> 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) )
47	36, 46	jaoi 721	. . . . . 6 |- ( ( R = 1 \/ R = 7 ) -> 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) )
48	29, 47	syl 14	. . . . 5 |- ( R e. { 1 , 7 } -> 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) )
49	28, 48	impbid1 142	. . . 4 |- ( R e. ( { 1 , 7 } u. { 3 , 5 } ) -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> R e. { 1 , 7 } ) )
50	3, 49	biimtrdi 163	. . 3 |- ( R = ( N mod 8 ) -> ( ( N mod 8 ) e. ( { 1 , 7 } u. { 3 , 5 } ) -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> R e. { 1 , 7 } ) ) )
51	1, 50	syl5com 29	. 2 |- ( ( N e. ZZ /\ -. 2 || N ) -> ( R = ( N mod 8 ) -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> R e. { 1 , 7 } ) ) )
52	51	3impia 1224	1 |- ( ( N e. ZZ /\ -. 2 || N /\ R = ( N mod 8 ) ) -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> R e. { 1 , 7 } ) )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 713   /\ w3a 1002   = wceq 1395   e. wcel 2200   u. cun 3195   {cpr 3667   class class class wbr 4083  (class class class)co 6001   0cc0 7999   1c1 8000   x. cmul 8004   - cmin 8317   / cdiv 8819   2c2 9161   3c3 9162   5c5 9164   7c7 9166   8c8 9167   ZZcz 9446   mod cmo 10544   ^cexp 10760   || cdvds 12298

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-nul 4210  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-iinf 4680  ax-cnex 8090  ax-resscn 8091  ax-1cn 8092  ax-1re 8093  ax-icn 8094  ax-addcl 8095  ax-addrcl 8096  ax-mulcl 8097  ax-mulrcl 8098  ax-addcom 8099  ax-mulcom 8100  ax-addass 8101  ax-mulass 8102  ax-distr 8103  ax-i2m1 8104  ax-0lt1 8105  ax-1rid 8106  ax-0id 8107  ax-rnegex 8108  ax-precex 8109  ax-cnre 8110  ax-pre-ltirr 8111  ax-pre-ltwlin 8112  ax-pre-lttrn 8113  ax-pre-apti 8114  ax-pre-ltadd 8115  ax-pre-mulgt0 8116  ax-pre-mulext 8117  ax-arch 8118

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-xor 1418  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-reu 2515  df-rmo 2516  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-if 3603  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-tr 4183  df-id 4384  df-po 4387  df-iso 4388  df-iord 4457  df-on 4459  df-ilim 4460  df-suc 4462  df-iom 4683  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-riota 5954  df-ov 6004  df-oprab 6005  df-mpo 6006  df-1st 6286  df-2nd 6287  df-recs 6451  df-frec 6537  df-pnf 8183  df-mnf 8184  df-xr 8185  df-ltxr 8186  df-le 8187  df-sub 8319  df-neg 8320  df-reap 8722  df-ap 8729  df-div 8820  df-inn 9111  df-2 9169  df-3 9170  df-4 9171  df-5 9172  df-6 9173  df-7 9174  df-8 9175  df-9 9176  df-n0 9370  df-z 9447  df-uz 9723  df-q 9815  df-rp 9850  df-fz 10205  df-fl 10490  df-mod 10545  df-seqfrec 10670  df-exp 10761  df-dvds 12299

This theorem is referenced by:  2lgsoddprmlem4  15791