Theorem 2lgsoddprmlem3 16110

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 16029	. . 3 |- ( ( N e. ZZ /\ -. 2 || N ) -> ( N mod 8 ) e. ( { 1 , 7 } u. { 3 , 5 } ) )
2		eleq1 2297	. . . . 5 |- ( ( N mod 8 ) = R -> ( ( N mod 8 ) e. ( { 1 , 7 } u. { 3 , 5 } ) <-> R e. ( { 1 , 7 } u. { 3 , 5 } ) ) )
3	2	eqcoms 2237	. . . 4 |- ( R = ( N mod 8 ) -> ( ( N mod 8 ) e. ( { 1 , 7 } u. { 3 , 5 } ) <-> R e. ( { 1 , 7 } u. { 3 , 5 } ) ) )
4		elun 3364	. . . . . 6 |- ( R e. ( { 1 , 7 } u. { 3 , 5 } ) <-> ( R e. { 1 , 7 } \/ R e. { 3 , 5 } ) )
5		elpri 3717	. . . . . . . 8 |- ( R e. { 3 , 5 } -> ( R = 3 \/ R = 5 ) )
6		oveq1 6065	. . . . . . . . . . . . . 14 |- ( R = 3 -> ( R ^ 2 ) = ( 3 ^ 2 ) )
7	6	oveq1d 6073	. . . . . . . . . . . . 13 |- ( R = 3 -> ( ( R ^ 2 ) - 1 ) = ( ( 3 ^ 2 ) - 1 ) )
8	7	oveq1d 6073	. . . . . . . . . . . 12 |- ( R = 3 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( ( ( 3 ^ 2 ) - 1 ) / 8 ) )
9		2lgsoddprmlem3b 16107	. . . . . . . . . . . 12 |- ( ( ( 3 ^ 2 ) - 1 ) / 8 ) = 1
10	8, 9	eqtrdi 2283	. . . . . . . . . . 11 |- ( R = 3 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = 1 )
11	10	breq2d 4126	. . . . . . . . . 10 |- ( R = 3 -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> 2 || 1 ) )
12		n2dvds1 12623	. . . . . . . . . . 11 |- -. 2 || 1
13	12	pm2.21i 651	. . . . . . . . . 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 6065	. . . . . . . . . . . . . 14 |- ( R = 5 -> ( R ^ 2 ) = ( 5 ^ 2 ) )
16	15	oveq1d 6073	. . . . . . . . . . . . 13 |- ( R = 5 -> ( ( R ^ 2 ) - 1 ) = ( ( 5 ^ 2 ) - 1 ) )
17	16	oveq1d 6073	. . . . . . . . . . . 12 |- ( R = 5 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( ( ( 5 ^ 2 ) - 1 ) / 8 ) )
18	17	breq2d 4126	. . . . . . . . . . 11 |- ( R = 5 -> ( 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) <-> 2 || ( ( ( 5 ^ 2 ) - 1 ) / 8 ) ) )
19		2lgsoddprmlem3c 16108	. . . . . . . . . . . 12 |- ( ( ( 5 ^ 2 ) - 1 ) / 8 ) = 3
20	19	breq2i 4122	. . . . . . . . . . 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 12626	. . . . . . . . . . 11 |- -. 2 || 3
23	22	pm2.21i 651	. . . . . . . . . 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 724	. . . . . . . 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 804	. . . . . 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 3717	. . . . . 6 |- ( R e. { 1 , 7 } -> ( R = 1 \/ R = 7 ) )
30		z0even 12622	. . . . . . . 8 |- 2 || 0
31		oveq1 6065	. . . . . . . . . . 11 |- ( R = 1 -> ( R ^ 2 ) = ( 1 ^ 2 ) )
32	31	oveq1d 6073	. . . . . . . . . 10 |- ( R = 1 -> ( ( R ^ 2 ) - 1 ) = ( ( 1 ^ 2 ) - 1 ) )
33	32	oveq1d 6073	. . . . . . . . 9 |- ( R = 1 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( ( ( 1 ^ 2 ) - 1 ) / 8 ) )
34		2lgsoddprmlem3a 16106	. . . . . . . . 9 |- ( ( ( 1 ^ 2 ) - 1 ) / 8 ) = 0
35	33, 34	eqtrdi 2283	. . . . . . . 8 |- ( R = 1 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = 0 )
36	30, 35	breqtrrid 4152	. . . . . . 7 |- ( R = 1 -> 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) )
37		2z 9622	. . . . . . . . 9 |- 2 e. ZZ
38		3z 9623	. . . . . . . . 9 |- 3 e. ZZ
39		dvdsmul1 12524	. . . . . . . . 9 |- ( ( 2 e. ZZ /\ 3 e. ZZ ) -> 2 || ( 2 x. 3 ) )
40	37, 38, 39	mp2an 426	. . . . . . . 8 |- 2 || ( 2 x. 3 )
41		oveq1 6065	. . . . . . . . . . 11 |- ( R = 7 -> ( R ^ 2 ) = ( 7 ^ 2 ) )
42	41	oveq1d 6073	. . . . . . . . . 10 |- ( R = 7 -> ( ( R ^ 2 ) - 1 ) = ( ( 7 ^ 2 ) - 1 ) )
43	42	oveq1d 6073	. . . . . . . . 9 |- ( R = 7 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( ( ( 7 ^ 2 ) - 1 ) / 8 ) )
44		2lgsoddprmlem3d 16109	. . . . . . . . 9 |- ( ( ( 7 ^ 2 ) - 1 ) / 8 ) = ( 2 x. 3 )
45	43, 44	eqtrdi 2283	. . . . . . . 8 |- ( R = 7 -> ( ( ( R ^ 2 ) - 1 ) / 8 ) = ( 2 x. 3 ) )
46	40, 45	breqtrrid 4152	. . . . . . 7 |- ( R = 7 -> 2 || ( ( ( R ^ 2 ) - 1 ) / 8 ) )
47	36, 46	jaoi 724	. . . . . 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 1227	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 716   /\ w3a 1005   = wceq 1398   e. wcel 2205   u. cun 3212   {cpr 3695   class class class wbr 4114  (class class class)co 6058   0cc0 8143   1c1 8144   x. cmul 8148   - cmin 8460   / cdiv 8963   2c2 9305   3c3 9306   5c5 9308   7c7 9310   8c8 9311   ZZcz 9594   mod cmo 10708   ^cexp 10924   || cdvds 12498

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-coll 4230  ax-sep 4233  ax-nul 4241  ax-pow 4292  ax-pr 4327  ax-un 4559  ax-setind 4664  ax-iinf 4715  ax-cnex 8234  ax-resscn 8235  ax-1cn 8236  ax-1re 8237  ax-icn 8238  ax-addcl 8239  ax-addrcl 8240  ax-mulcl 8241  ax-mulrcl 8242  ax-addcom 8243  ax-mulcom 8244  ax-addass 8245  ax-mulass 8246  ax-distr 8247  ax-i2m1 8248  ax-0lt1 8249  ax-1rid 8250  ax-0id 8251  ax-rnegex 8252  ax-precex 8253  ax-cnre 8254  ax-pre-ltirr 8255  ax-pre-ltwlin 8256  ax-pre-lttrn 8257  ax-pre-apti 8258  ax-pre-ltadd 8259  ax-pre-mulgt0 8260  ax-pre-mulext 8261  ax-arch 8262

This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-xor 1421  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-reu 2529  df-rmo 2530  df-rab 2531  df-v 2817  df-sbc 3046  df-csb 3142  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-if 3625  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-int 3955  df-iun 3998  df-br 4115  df-opab 4177  df-mpt 4178  df-tr 4214  df-id 4419  df-po 4422  df-iso 4423  df-iord 4492  df-on 4494  df-ilim 4495  df-suc 4497  df-iom 4718  df-xp 4760  df-rel 4761  df-cnv 4762  df-co 4763  df-dm 4764  df-rn 4765  df-res 4766  df-ima 4767  df-iota 5317  df-fun 5359  df-fn 5360  df-f 5361  df-f1 5362  df-fo 5363  df-f1o 5364  df-fv 5365  df-riota 6011  df-ov 6061  df-oprab 6062  df-mpo 6063  df-1st 6347  df-2nd 6348  df-recs 6549  df-frec 6635  df-pnf 8326  df-mnf 8327  df-xr 8328  df-ltxr 8329  df-le 8330  df-sub 8462  df-neg 8463  df-reap 8866  df-ap 8873  df-div 8964  df-inn 9255  df-2 9313  df-3 9314  df-4 9315  df-5 9316  df-6 9317  df-7 9318  df-8 9319  df-9 9320  df-n0 9514  df-z 9595  df-uz 9872  df-q 9970  df-rp 10005  df-fz 10362  df-fl 10654  df-mod 10709  df-seqfrec 10834  df-exp 10925  df-dvds 12499

This theorem is referenced by:  2lgsoddprmlem4  16111